title: Studies of natural populations of Mus. IV. Skeletal variations.
mesh_terms: D000818:Animals; D014644:Genetic Variation; D005828:Genetics, Population; D051379:Mice; D012447:Sacrum / Q000033:anatomy & histology; D012641:Selection, Genetic; D012863:Skeleton / Q000033:anatomy & histology*; D012886:Skull / Q000033:anatomy & histology