Earthworms, their intensive propagation and use in biological soil-building
Subtitle: the Earthmaster system.
Edition: [5th rev. ed.]
Publisher: Earthmaster Publications
Published: 1948
Place of publication: Roscoe, Calif
Language: eng
Number of pages: 59
Subjects: Earthworm culture.; Soils.
Other titles: Biological soil- building.; Soil-building.; Earthmaster system.
Notes: "An introduction to the more complete textbook, H̓arnessing the earthworm."̓-p. 54.
Pub. 1942 under title: The Earthmaster system for intensive propagation and use of domesticated earthworms.