Comparative testing of the flight-pollinating activity of Carpathian bees and their use in package beekeeping for the pollination of red clover in the Non-Chernozem Zone

Moscow

140 pp.

Comparative testing of the flight-pollinating activity of Carpathian bees and their use in package beekeeping for the pollination of red clover in the Non-Chernozem Zone — Tsoy, Dmitry Ivanovich — 1990 — Russian Dissertation Library