Unknown. (2023). Progress Report of the Northern Forest Rangers College, Dehradun for the year 1956-57. Forest Research Institute, Dehradun.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
MLA -ийн эшлэл (9 дэх хэвлэлт)Unknown. Progress Report of the Northern Forest Rangers College, Dehradun for the Year 1956-57. Forest Research Institute, Dehradun, 2023.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.