The FAO Corporate Document Repository houses FAO documents and publications, as well as selected non-FAO publications, in electronic format. It enables users to easily access the accumulated knowledge and information produced by FAO directly on the Internet.
http://www.fao.org/

United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP).
List of publications with full text available online.
http://www.unescap.org/

Public Organizations:

Department of Environmental Quality Promotion
Ministry of Natural Resources and Environment
http://www.deqp.go.th/

Office of Agricultural Economics
Ministry of Agriculture and Cooperatives
http://www.oae.go.th/

Forestry Department
http://www.forest.go.th/

Private Institutions:

Doi Tung Development Project under Royal Initiative works to eradicate opium supply, drug use, rural poverty through Sustainable Alternative Development, education, training, humanitarian activities, environment conservation, agriculture, handicrafts, culture preservation, tourism, in Thailand, Golden Triangle. http://www.doitung.org/

The Mekong Environment and Resource Institute ( MERI )
http://www.merimekong.or.th/

Thailand Environment Institute (TEI)
http://www.tei.or.th/