1.
Poult Sci
; 48(3): 1019-21, 1969 May.
Article
in English
| MEDLINE
| ID: mdl-5389902
2.
Berl Munch Tierarztl Wochenschr
; 82(4): 65-7, 1969 Feb 15.
Article
in German
| MEDLINE
| ID: mdl-5388569