- Psychic and Economic Results of Man's Physical Uprightness
- The Physical Basis of Civilization; A Revised Version of Psychic and Economic Results of Man's Physical Uprightness. a Demonstration That Two Small Anatomical Modifications Determined Physical, Mental
- The Physical Basis of Civilization: A Revised Version of "Psychic and Economic Results of Man's Physical Uprightness." a Demonstration That Two Small ... Economic, Social, and Political Conditions
- The Physical Basis of Civilization: A Revised Version of "Psychic and Economic Results of Man's Physical Uprightness." a Demonstration That Two Small ... Economic, Social, and Political Conditions



