by Louis S. B. Leakey ; Foreword by Leonard Carmichael ; Produced by the National Geographic Special Publications DivisionNational Geographic Societyc1969
by Austin Roberts ; edited by R. Bigalke, V. FitzSimons and D.E. Malan ; with a foreword by J. Stevenson-Hamilton ; colour plates by P.J. SmitTrustees of "The Mammals of South Africa" Book Fund1951