1. Three species of Pythium with proliferous sporangia;Drechsler;Phytopathology,1941
2. Several species of Pythium peculiar in their sexual development;Drechsler;Phytopathology,1946
3. The taxonomy, host range, and geographic distribution of the genus Pythium;Middleton;Mem. Torrey Bot. Cl.,1943
4. A method of freeing fungi from bacterial contamination;Raper;Science,1937