Swarm control
Demuth, Geo. S. (George S.)
creator
text
book
Washington
U. S. Govt. Print. Off
1921
1921
ENG
Caption title.
Bees
Swarming
Farmers' bulletin (United States. Dept. of Agriculture), no. 1198
https://www.biodiversitylibrary.org/bibliography/54216
63227342
10.5962/bhl.title.54216
NIC