| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Population, Resources and Environment: 2014-2015 Revised Printing | 978-1-4652-5656-0 (1-4652-5656-3) | 2014 |
| Population, Resources and Environment: 2015-2016 Revised Printing | 978-1-4652-8417-4 (1-4652-8417-6) | 2015 |
CLARK GEORGE F · "F.C." · G. C. · G. Clark · G *** F · George-C · George Clark · George F. · George Faber Clark