These appear to be the cookbooks published/printed 1951 thru 1974 including the 1951 and 1964 Editions, published up to and including 1974, only the later years with ISBNs. ( some copies however may belong to earlier or later editions but cannot be separated out as they are hidden within small clumps of books automatically combined by LT in the past).
Dates of the various Joy versions are easy to determine by the fabric of the cover. The blue and white plaid cover is present on all pre-1951 Joys. Irma is the sole author. The next version is the blue cover with the verticlal white stripes interspersed with the Joy logo. That is the 1951 version, with Irma's daughter as co-author. The solid greenish-blue covers arrived on the scene in the 60s.