1. Importance of bees in sweet-clover seed production;Alex A.;Texas Agricultural Experiment Station Progress Report, 1458,1952
2. Are Melilotus albus and M. officinalis conspecific?
3. Crop pollination by bees.
4. Three-way approach brings better legume seed production;Holdaway F.;Minnesota Farm Home Science,1957
5. Potential use of the alfalfa leafcutter beeMegachile rotundatato pollinate sweet clover