Gurmel Singh. (1990). mannual of soil and water conseervation Practices. Oxford and IBH publishing.
Chicago ZitierstilGurmel Singh. Mannual of Soil and Water Conseervation Practices. New Delhi: Oxford and IBH publishing, 1990.
MLA ZitierstilGurmel Singh. Mannual of Soil and Water Conseervation Practices. Oxford and IBH publishing, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.