Unknown. (2023). Progress Report of the Northern Forest Rangers College, Dehradun for the year 1956-57. Forest Research Institute, Dehradun.
Chicago-referens (17:e uppl.)Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
MLA-referens (9:e uppl.)Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.