1. Antony van Leeuwenhoek and his “little animals.”;Dobell,1932
2. Measuring the invisible world;Schierbeek,1959
3. Leeuwenhoek’s observation of bacteria;Casida;Science,1976
4. On Leeuwenhoek’s magnifications;O’Mara;Antonie van Leeuwenhoek,1979
5. Bacteria;Magnin,1884