A manual of bee husbandry Carr, Elmer G. (Elmer Grant), 1872-1953 creator text book Trenton, N. J 1922 1922
print
ENG Bees Circular (New Jersey. Dept. of Agriculture), 53 https://www.biodiversitylibrary.org/bibliography/53966 63353639 10.5962/bhl.title.53966 NIC