Singh, R. L. (1977). Role of geography as an integrating science. National Geographical Soc. of India.
Chicago-Zitierstil (17. Ausg.)Singh, Ram L. Role of Geography as an Integrating Science. Varanasi: National Geographical Soc. of India, 1977.
MLA-Zitierstil (9. Ausg.)Singh, Ram L. Role of Geography as an Integrating Science. National Geographical Soc. of India, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.