Mammalian evolution: upwards and onwards.
Weil
Anne
A
D000818:Animals; D005075:Biological Evolution; D002681:China; D005529:Foot Bones / Q000033:anatomy & histology; D005580:Fossils; D006724:Hoof and Claw / Q000502:physiology; D008124:Locomotion; D008322:Mammals / Q000033:anatomy & histology / Q000502:physiology; D010802:Phylogeny; D010920:Placenta / Q000502:physiology; D012098:Reproduction; D012863:Skeleton; D014070:Tooth