©2013 National Research Council of Thailand
Wallop Promthong. 1995. Farmer's utilization of tobacco production technology and the perceived health consequences in Phetchabun province, ThailandWallop Promthong. Faculty of Graduate School, University of Philippines Los Banos;
Wallop Promthong. (1995) Farmer's utilization of tobacco production technology and the perceived health consequences in Phetchabun province, ThailandWallop Promthong . University of Philippines Los Banos/Los Banos.
Wallop Promthong. Farmer's utilization of tobacco production technology and the perceived health consequences in Phetchabun province, ThailandWallop Promthong. . Los Banos:University of Philippines Los Banos, 1995.
Wallop Promthong. (1995) Farmer's utilization of tobacco production technology and the perceived health consequences in Phetchabun province, ThailandWallop Promthong . University of Philippines Los Banos/Los Banos.