https://openlibrary.org/books/OL9470387M.opds Men, Microscopes and Living Things 2022-12-17T16:12:47Z Katherine B. Shippen https://openlibrary.org/authors/OL2686979A/Katherine_B._Shippen Viking Juvenile April 1, 1955 https://openlibrary.org/books/OL9470387M urn:ISBN:0670468762 urn:ISBN:9780670468768