G. P. · G. Philip · P R · Philip R.
| title | media type | ISBN-13 (ISBN-10) | year of publication | 
|---|---|---|---|
| The Evolution of Homo Erectus: Comparative Anatomical Studies of an Extinct Human Species | Paperback | 978-0-521-44998-4 (0-521-44998-7) | 2008 | 
| The Evolution of Homo Erectus: Comparative Anatomical Studies of an Extinct Human Species | Hardcover | 978-0-521-30880-9 (0-521-30880-1) | 1990 |