| Country | Geographic coverage | Title | Year | First author | 2nd author | Publisher | Publication | Volume | Edition | Page numbers | Location | Keywords | Subject | Language | Reviewed | Abstract | Downloadable | website | note |
| Bhutan | Thimphu Air pollution | 1999 | Nedup Tshering, NECS, Thimphu | NECS | Thimphu Air pollution survey | 1 | 1 | Thimphu | Monitoring | Air quality | English | No | No | No | No | ||||
| Bhutan | National Communications | 1999 | Greenhouse gases Project Management Team | NECS | Greenhouse gases inventory | 2 | 1 | National | Monitoring | Air Quality | English | No | No | No | No | ||||
| Bhutan | Project report for establishing Vehicle emission standard in Bhutan | 1999 | Nedup Tshering, NECS, Thimphu | NECS | Proposal | 1 | 1 | National | Policy and monitoring | air quality | English | No | No | No | No |