TY  - BOOK
AU  - Shull, George Harrison,
TI  - Bursa bursa-pastoris and Bursa heegeri biotypes and hybrids
U1  - P 581.158 S59 
PY  - 1909///
CY  - Washington, D.C.
PB  - Carnegie Institution of Washington
KW  - Bursa bursa
KW  - pastoris
KW  - Bursa heegeri
KW  - Hybridization, Vegetable
N1  - "Papers of the Station for Experimental Evolution, no.12"; "Literature cited": p.57
ER  -