Roongroj Pitakdantham และ Amnut Suwanarit. (2007) Studies on enhancing the effects of arbuscular mycorrhizal fungi on maize under field conditions. Kasetsart University,:ม.ป.ท.Roongroj Pitakdantham และ Amnut Suwanarit. 2007. Studies on enhancing the effects of arbuscular mycorrhizal fungi on maize under field conditions. ม.ป.ท.:Kasetsart University,;Roongroj Pitakdantham และ Amnut Suwanarit. Studies on enhancing the effects of arbuscular mycorrhizal fungi on maize under field conditions. ม.ป.ท.:Kasetsart University, 2007. Print.