https://openlibrary.org/books/OL9470387M.opdsMen, Microscopes and Living Things2022-12-17T16:12:47ZKatherine B. Shippenhttps://openlibrary.org/authors/OL2686979A/Katherine_B._ShippenViking JuvenileApril 1, 1955https://openlibrary.org/books/OL9470387Murn:ISBN:0670468762urn:ISBN:9780670468768