Sustoianie, perspektiva na razvitie i sistema za vodene na selskoto stopanstvo v Sofiisko-Pernishkiia raion
By: [Red. kol. Nikola Palagachev, Bonʹo Raichev i Georgi Gergov]
Publisher: Zemizdat
Published: 1971
Place of publication: Sofiia
Language: bul
Notes: At head of title: Akademiia na selskostopanskite nauki. Suvet za nauchno-tekhnicheski kontseptsii i prognozi.

Vol. [2] includes "Tekhnologicheski karti".