| title | ISBN-13 | year of publication |
|---|---|---|
| Am I Called? | 978-1-59638-543-6 | 2013 |
| Rice and weather | 978-92-63-10423-6 | 1975 |
| The role of agrometeorology in agricultural development and investment projects | 978-92-63-10536-3 | 1980 |
| What Is Evangelism | 978-1-59638-766-9 | 2013 |
G. Robertson · G. W. · G. W. Robertson · George R. · George Robertson · George W. · W R. · W. Robertson