title: Early anatomical development of specific-pathogen-free New Hampshire cockerels.
mesh_terms: D000367:Age Factors; D000818:Animals; D000906:Antibodies / Q000032:analysis; D001991:Bronchitis / Q000276:immunology / Q000662:veterinary; D002645:Chickens / Q000033:anatomy & histology / Q000254:growth & development*; D005856:Germ-Free Life; D007106:Immune Sera / Q000032:analysis; D008297:Male; D009174:Mycoplasma / Q000276:immunology; D009522:Newcastle disease virus / Q000276:immunology; D009929:Organ Size; D010375:Pedigree; D011201:Poultry Diseases / Q000276:immunology; D014777:Virus Diseases / Q000276:immunology / Q000662:veterinary
chemical_list: D000906:Antibodies; D007106:Immune Sera