@book{bhlitem75046, title = {Bursa bursa-pastoris and Bursa heegeri biotypes and hybrids }, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/75046}, note = {https://www.biodiversitylibrary.org/bibliography/31187}, publisher = {Washington, D.C, Carnegie Institution of Washington, 1909}, author = {Shull, George Harrison,}, year = {}, pages = {80}, keywords = {Bursa bursa-pastoris|Bursa heegeri|Hybridization, Vegetable|}, }