1. The Collected Letters of Antonj van Leeuwenhoek;Committee of Dutch Scientists,1941
2. Antonj van Leeuwenhoek and His “Little Animals.”;Dobell,1960
3. Spallanzani on spontaneous generation and digestion;Prescott;Proc R Soc Med,1930
4. The mammalian spermatozoon;Fawcett;Dev Biol,1975