Yongyut Khonchantet. (2007) Valuation of fishery and non timberforest product of seasonally flooded forest in the lower Songkhram river basin Nakhon Phanom. Mahidol University,:ม.ป.ท.Yongyut Khonchantet. 2007. Valuation of fishery and non timberforest product of seasonally flooded forest in the lower Songkhram river basin Nakhon Phanom. ม.ป.ท.:Mahidol University,;Yongyut Khonchantet. Valuation of fishery and non timberforest product of seasonally flooded forest in the lower Songkhram river basin Nakhon Phanom. ม.ป.ท.:Mahidol University, 2007. Print.