Postembryonal histological and histochemical changes in the bursa of Fabricius and spleen of chickens and their relationship to the development of immunological competaence.
D000818:Animals; D002060:Bursa of Fabricius / Q000276:immunology*; D002645:Chickens; D006651:Histocytochemistry; D013154:Spleen / Q000276:immunology*