01073cam a22003011 4500 agr48000512 DLC 20260227111010.0 770520s1948 xx 000 0 eng c agr48000512 (OCoLC)2982078 U. S. Dept. of Agr. Libr. ODa DLC premarc SB998.E4 B35 1948 631.45 Barrett, Thomas Jason, 1884- Earthworms, their intensive propagation and use in biological soil-building; the Earthmaster system. [5th rev. ed.] Roscoe, Calif., Earthmaster Publications, c1948. 59 p. illus., port. 23 cm. "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. Earthworm culture. Soils. Biological soil- building. Soil-building. Earthmaster system. 10906 10906