Heat production of honeybees in winter Milner, R. D. (Robert Denniston), 1869- creator Demuth, George Sidney, 1871-1934 contributor text book Washington, D.C U.S. Dept. of Agriculture 1921 1921
print
ENG Caption title. "December 5, 1921." "Professional paper." Bee culture Honeybee Wintering Bulletin of the U.S. Department of Agriculture, no. 988 https://www.biodiversitylibrary.org/bibliography/108785 16654779890420 10.5962/bhl.title.108785 RQF