#1 Robert A. Clark, 1948- author of The Killing of Chief Crazy Horse
#2 Robert A. (Robert Alfred) Clark, 1908- author of Talking with "God"
#3 Roberta Clark author of The Gold Covenant NOTE: robertaclark is not an author
#4 Clark, Robert A., 1954- Africa's emerging securities markets
#5 Clark, Robert A. Never let 'em quit