Vintage set of two illustrated medical and health encyclopedia books

Vintage set of two illustrated medical and health encyclopedia books Volume 5-6 and volume 7-8 Edited by Morris Fishbein, M.D. Copyright dates: 1957, 1959, 1963, 1966 Other copyrights listed start at 1935 through 1956 Black and white pictures throughout Yellowing pages Some loosening of binding but still intact Some staining when books are closed on pages (see picture) Very interesting to read how far medical research and procedures have come since then Want to sell together