Estos son los registros de libros publicados por G.P. Hettel.
| ISBN | Título | Editorial | Autor(es) | Año |
|---|---|---|---|---|
| 978-968-6923-03-2 | Management and use of International Trial data for Improving Breeding Efficiency | Centro Internacional de Mejoramiento de Maíz y Trigo | G.P. Hettel P.N. Fox | 1992 |
| 978-968-6923-02-5 | Estado Actual de La Investigación sobre el Carbón Parcial en México | Centro Internacional de Mejoramiento de Maíz y Trigo | G. Fuentes Dávila G.P. Hettel | 1992 |
| 978-968-6127-68-3 | International Agricultural Research;The next 25 years, On the Occasion of CIMMYT's 25th Anniversary 1966-1991 | Macrobit Corporation | G.P. Hettel K.A. Cassaday | 1992 |
| 978-968-6127-63-8 | Rice Wheat Cropping Systems in Faizabad District of Uttar Pradesh, India; Exploratory Surveys of Farmers' Practices and Problems and Needs for Further | Macrobit Corporation | G.P. Hettel P.R Hobbs | 1992 |
| 978-968-6127-56-0 | Rice-Wheat Cropping Systems in the Tarai Areas of Nainital, Rampur and Pilibhit Districts in Uttar Pradesh, India; Diagnostic Surveys of Farmer's | Macrobit Corporation | G.P. Hettel P.R. Hobbs | 1991 |