Earthworm production /
[prepared by Jayson K. Harper and George L. Greaser].
APA Citation
Harper, J. K., Greaser, G. L., Pennsylvania State University. Cooperative Extension Service. (1994). Earthworm production. [University Park, Pa.]: Penn State College of Agricultural Sciences, Cooperative Extenstion.
MLA Citation
Harper, Jayson K, George L Greaser, and Pennsylvania State University. Cooperative Extension Service. Earthworm Production. [University Park, Pa.]: Penn State College of Agricultural Sciences, Cooperative Extenstion, 1994.
Warning: These citations may not always be complete (especially for serials).