@book{bhlitem23501, title = {What evolution is }, copyright = {No known copyright restrictions as determined by scanning institution}, url = {https://www.biodiversitylibrary.org/item/23501}, note = {https://www.biodiversitylibrary.org/bibliography/4560}, publisher = {Cambridge, Harvard University Press, 1925}, author = {Parker, George Howard,}, year = {1925}, pages = {200}, keywords = {Evolution|}, }