@book{bhlitem23713, title = {Die Entwickelungsgeschichte der Kreuzotter (Pelias berus Merr.) }, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/23713}, note = {https://www.biodiversitylibrary.org/bibliography/4692}, publisher = {Jena, G. Fischer, 1903}, author = {Ballowitz, Emil,}, year = {1903}, pages = {352}, keywords = {Snakes|Viperidae}, }