Bursa bursa-pastoris and Bursa heegeri biotypes and hybrids Shull, George Harrison, 1874-1954 creator text book Washington, D.C Carnegie Institution of Washington 1909 1909
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ENG "Papers of the Station for experimental evolution no. 12." Bursa bursa-pastoris Bursa heegeri Hybridization, Vegetable QH406 .S5 Carnegie Institution of Washington publication, 112 Paper ... of Department of Genetics (Carnegie Institution of Washington), no. 12 https://www.biodiversitylibrary.org/bibliography/31187 09021879 10.5962/bhl.title.31187