Katalog na izobretenii͡ata 1972-1979 godina
By: [sŭstaviteli Parashkevit͡sa Vŭrbenova, Violeta Paskaleva].
Publisher: Medit͡sinska akademii͡a
Published: 1980
Place of publication: Sofii͡a
Language: bul
Number of pages: 298