G. Geoffrey Harper ยท Geoffrey Hugh Harper
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Democracy & the Biosphere Crisis: the Rational Voter's Guide | 978-0-9532990-6-5 (0-9532990-6-6) | 2019 |
| Democracy or Survival: Governance & the Biosphere Crisis | 978-0-9532990-8-9 (0-9532990-8-2) | 2012 |