@book{bhlitem40833, title = {Gymnosperms; structure and evolution }, copyright = {No known copyright restrictions as determined by scanning institution}, url = {https://www.biodiversitylibrary.org/item/40833}, note = {https://www.biodiversitylibrary.org/bibliography/10239}, publisher = {Chicago, Ill, The University of Chicago Press, [1935]}, author = {Chamberlain, Charles Joseph,}, year = {1935}, pages = {504}, keywords = {Gymnosperms|}, }