@book{bhlpg31093224, title = {Historia naturalis bulgarica }, volume = {v.12 (2000)}, url = {https://www.biodiversitylibrary.org/page/31093224}, publisher = {Bulgarska akademiia na naukite}, author = {Bŭlgarska akademii︠a︡ na naukite. }, year = {2000}, pages = {Page 25}, } @book{bhlpg31093220, title = {Historia naturalis bulgarica }, volume = {v.12 (2000)}, url = {https://www.biodiversitylibrary.org/page/31093220}, publisher = {Bulgarska akademiia na naukite}, author = {Bŭlgarska akademii︠a︡ na naukite. }, year = {2000}, pages = {Page 21}, }