Marek's vaccine on target
Series: Picture story -- no. 273; Picture story (United States. Department of Agriculture) -- no. 273.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1973
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Marek's disease; Avian leukosis; Vaccination; Chickens
Notes: Cover title.

"November 1973."