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8 sets of 20 slides by Selman Waksman in pop-up slide holders.
Selman Abraham Waksman (1888 – 1973) was an American Chemist and Microbiologist. Waksman is recognized for his work with antibiotics, a term he himself coined, most notably the discovery of streptomycin, the first antibiotic active against tuberculosis, for which he won the 1952 Nobel Prize in Medicine.