Ratanaporn Wisessang. 1999. Elderly health welfare in Thailand. Program of Health Economics, Chulalongkorn University;
Ratanaporn Wisessang. (1999) Elderly health welfare in Thailand . Chulalongkorn University/Bangkok.
Ratanaporn Wisessang. Elderly health welfare in Thailand. . Bangkok:Chulalongkorn University, 1999.
Ratanaporn Wisessang. (1999) Elderly health welfare in Thailand . Chulalongkorn University/Bangkok.