title: A salute to fifty-four great microscopists of the past: a pictorial footnote to the history of protozoology. Part I.
mesh_terms: D000818:Animals; D056890:Eukaryota; D049672:History, 19th Century; D049673:History, 20th Century; D008829:Microbiology / Q000266:history*; D008853:Microscopy / Q000266:history*