Yupa Kumtapol และ Thinaphan Nithiyuwith;Tassanan Treenuntharath. (2022) THE RECOMMENDATION OF HEALTHY TOURISM ROUTES FOR ELDERLY IN KHAOKHO DISTRICT, PHETCHABUN PROVINCE BY USING ANALYTIC HIERARCHY PROCESS. <i>Life Sciences and Environment Journal</i>, <i>23</i>(2), 521-538.Yupa Kumtapol และ Thinaphan Nithiyuwith;Tassanan Treenuntharath. "THE RECOMMENDATION OF HEALTHY TOURISM ROUTES FOR ELDERLY IN KHAOKHO DISTRICT, PHETCHABUN PROVINCE BY USING ANALYTIC HIERARCHY PROCESS". Life Sciences and Environment Journal 23 (2022):521-538.Yupa Kumtapol และ Thinaphan Nithiyuwith;Tassanan Treenuntharath. THE RECOMMENDATION OF HEALTHY TOURISM ROUTES FOR ELDERLY IN KHAOKHO DISTRICT, PHETCHABUN PROVINCE BY USING ANALYTIC HIERARCHY PROCESS. Pibulsongkram Rajabhat University:ม.ป.ท. 2022.