Barber, John C.Stewart, Donald M.2010-01-252010-01-251957-10-15Barber, J.C. and Steward D.M., (1957), "Vacuum Storage of Pollen Proves Feasible ", Minnesota Forestry Notes 62, School of Forestry, University of Minnesota0099-4332https://hdl.handle.net/11299/56712Published as Scientific Journal Paper Series No. 3812 of the Minnesota Agricultural Experiment Station.en-USforests and forestryMinnesotaresearchReport