| Type |  Book |
| ชื่อเรื่อง | Ecology of the subarctic regions = Ecologie des regions subarctiques : proceedings of the Helsinki sympoium, 25 July - 3 August 1966 / organized by the Government of Finland and Unesco ; in co-operation with the International Geographical Union |
| พิมพลักษณ์ | Paris : Unesco, c1970 |
| รูปเล่ม | 364 p. : ill |
| หัวเรื่อง | Cold regions --Congresses [] |
| | Conservation of natural resources --Arctic regions --Congresses [] |
| | Ecology --Arctic regions --Congresses [] |
| | Forest ecology --Congresses [] |