Biodiversity Heritage Library

By: Shull, George Harrison,

Publication info: Washington, D.C.,Carnegie Institution of Washington,1909.

Contributed by: NCSU Libraries (archive.org)

Subjects: Bursa bursa-pastoris  Bursa heegeri  Plant hybridization  

By: Shull, George Harrison,

Publication info: Washington, D.C.,Carnegie Institution of Washington,1909.

Contributed by: University of California Libraries (archive.org)

Subjects: Bursa bursa-pastoris  Bursa heegeri  Hybridization, Vegetable  

By: Shull, George Harrison,

Publication info: Washington,Carnegie Institution,1909.

Contributed by: Cornell University Library

Subjects: Bursa heegeri  Plant hybridization