[Loyalty to science (on the 70th birthday of Ia. R. Kovalenko, academician of the V.I. Lenin All-Union Academy of Agricultural Sciences)].
D049673:History, 20th Century; D012425:Russia (Pre-1917); D014586:USSR; D014730:Veterinary Medicine / Q000266:history
Vernost' nauke (k 70-letiiu so dnia rozhdeniia Ia. R. Kovalenko, akademika VASKhNIL)