Melvil Decimal System: 549.68
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Philosophy and Psychology
Mathematics and Science
Arts and Recreation
Biography and History
Earth sciences & geology
Fossils & prehistoric life
Qualitative Analysis [No longer used]
Quantitative Analysis [No longer used]
Sulfids, tellurids, selenids, arsenids, antimonids, bismuthids
Compounds of chlorin, bromin, iodin, and fluorin
Other ternary oxygen compounds
Works under MDS 549.68
- Crystals for Beginners: A Guide to Collecting & Using Stones & Crystals (For Beginners (Llewellyn's)) by Corrine Kenner
- An Archaeologist's Guide to Chert and Flint (ARCHAEOLOGICAL RESEARCH TOOLS) by Barbara E. Luedtke
- Atlas of Zeolite Framework Types, Sixth Edition by Ch. Baerlocher
- Collector's Guide to Quartz and Other Silica Minerals (Schiffer Earth Science Monographs) by Robert J. Lauf
- Collector's Guide to the Feldspar Group (Schiffer Earth Science Monographs) by Robert J. Lauf
- Collecting Crystals: The Guide to Arkansas Quartz (Rock Collecting) by Mike Howard
- Natural zeolites by G. Gottardi
- Quartz by Herbert Zim
- South Dakota state gemstone : Fairburn agate by Roger Clark
- Petrology and genesis of leucite-bearing rocks by Alok K. Gupta
- Feldspar Mineralogy (Reviews in Mineralogy : Vol 2) by P. H. Ribbe
- Zeolites and zeolite-like materials by Bert F. Sels
- Australian Precious Opal by Andrew Cody
- Quartz (Butterworths Gem Books) by Michael O'Donoghue
- The quartz crystal microbalance in soft matter research : fundamentals and modeling by Diethelm Johannsmann
- MWW-Type titanosilicate : synthesis, structural modification and catalytic applications to green oxidations by Wu Peng (吴蓬)
- Quartz deposits, mineralogy and analytics by Jens Götze
- Feldspar minerals. Volume 1, Crystal structures, physical, chemical, and microtextural properties by Joseph V Smith
- Feldspar minerals. in three volumes / 1, Crystal structures and physical properties by Joseph V Smith
- Zeolites of the world by Rudy W. Tschernich
- New Developments in Quartz Research: Varieties, Crystal Chemistry and Uses in Technology (Geology and Mineralogy Research Development) by Bruno Novak
- Handbook of Zeolites: Structure, Properties and Applications by T. W. Wong
- Collector's Guide to the Zeolite Group (Schiffer Earth Science Monographs) by Robert J. Lauf
- The identification of detrital feldspars by L. van der Plas
- Feldspar Minerals: Crystal Structures, Physical, Chemical, and Microtextural Properties by Joseph V Smith
- Feldspar : mineral composition, geology and petrogenesis significance by Jorge B. Escamilla
- Zeolites synthesis, chemistry, and applications by Moisey K. Andreyev
- Atlas of Quartz Sand Surface Textures by David H. Krinsley
- Insights into the chemistry of organic structure-directing agents in the synthesis of zeolitic materials by Luis Gómez-Hortigüela
- The History of Quartz: Ron Coleman Mining (DVD) by Ron Coleman
- Handbook of natural zeolites by Vassilis J. Inglezakis
- Zeolites and Related Materials: Trends Targets and Challenges, Volume 174B: 4th International FEZA Conference, 2-6 September 2008, Paris, France (Studies in Surface Science and Catalysis) by Antoine Gedeon
- The Collector's Guide to Herkimer Diamonds (Schiffer Earth Science Monographs) by Michael R. Walter
- Technological Analysis on Quartzite Exploitation: Proceedings of the XV UISPP World Congress (Lisbon, 4-9 September 2006) Pt. 39 (British Archaeological Reports International Series) by Stefano Grimaldi
- Environmental zeolites and aqueous media : examples of practical solutions by Eva Chmielewská
MDS classes with significant recommendations overlap, excluding ones under the same top-level class.
What is MDS?
Melvil stands for "Melvil Decimal System," named after Melvil Dewey, the famous librarian. Melvil Dewey invented his Dewey Decimal System in 1876, and early versions of his system are in the public domain.
More recent editions of his system are in copyright, and the name "Dewey," "Dewey Decimal," "Dewey Decimal Classification" and "DDC" are registered trademarked by OCLC, who publish periodic revisions.
LibraryThing's MDS system is based on the classification work of libraries around the world, whose assignments are not copyrightable. MDS "scheduldes" (the words that describe the numbers) are user-added, and based on public domain editions of the system.
The Melvil Decimal System is NOT the Dewey Decimal System of today. Wordings, which are entered by members, can only come from public domain sources. The base system is the Free Decimal System, a public domain classification created by John Mark Ockerbloom. Where useful or necessary, wording comes from the 1922 edition of the Dewey Decimal System. Language and concepts may be changed to fit modern tastes, or to better describe books cataloged. Wordings may not come from in-copyright sources.