Linchong Pothiban. 1999. Need assessment of the elderly in Chiang Mai city. Chiang Mai:Chiang Mai University;
Linchong Pothiban. (1999) Need assessment of the elderly in Chiang Mai city (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.
Linchong Pothiban. Need assessment of the elderly in Chiang Mai city. Chiang Mai:Chiang Mai University, 1999.
Linchong Pothiban. (1999) Need assessment of the elderly in Chiang Mai city (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.