Tipizirane na senata ot niakoi raioni na severna Bŭlgarii︠a︡
By: B. Akhtarov, G.N. Georgiev, Z.M. Peteva
Publisher: Izd. Bŭlgarskata akademii͡a na naukite
Published: 1958
Place of publication: Sofii͡a
Language: bul
Number of pages: 108
Subjects: Agriculture
Notes: Classification of hay in some areas of Northern Bulgaria.