The vitamin A (carotene) requirements for egg production and hatchability
By: by Max Rubin ...
Published: 1942
Language: eng
Number of pages: 35
Subjects: Eggs -- Production; Birds -- Embryology; Crotin
Notes: "References": leaves 34-45.
Thesis (Ph. D.)--University of Maryland, College Park, 1942.
Type-written (carbon copy)