Title: The Advance of agriculture and agricultural sciences in Bulgaria during the years of the people's power.
Authors: T︠S︡entŭr za nauchno-tekhnicheska i ikonomicheska informat︠s︡ii︠a︡ po selsko i gorsko stopanstvo (Selskostopanska akademii︠a︡ Georgi Dimitrov)
Year: 1969
Subjects: Agriculture Bulgaria