Pollination of deciduous fruits by bees Philp, Guy L. (Guy Lockhart), 1890-1947 creator Vansell, George H. (George Haymaker), 1892-1954 contributor text book Berkeley, Calif College of Agriculture, University of California 1932 1932
print
ENG Bees Fertilization of plants Circular (University of California Agricultural Extension Service), 62 https://www.biodiversitylibrary.org/bibliography/53414 10.5962/bhl.title.53414 Univ. of Calif.