Editore: U. S. Department of Agriculture, Washington DC, 1955
Da: Book Booth, Berea, OH, U.S.A.
Paperback. Condizione: Good. minor shelf wear and cover soil, corners lightly bumped, stapled binding tight, 16 pages, covers the diapause, determination of time of emergence, sex ration of parasites and synchronization of parasite and host Size: 6 x 9.