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Sapit Royampaen. (1995) Effects of air pollution on some physiological and morphological characteristics of Pterocarpus indicus willd . Kasetsart University/Bangkok.
Sapit Royampaen. Effects of air pollution on some physiological and morphological characteristics of Pterocarpus indicus willd. . Bangkok:Kasetsart University, 1995.
Sapit Royampaen. (1995) Effects of air pollution on some physiological and morphological characteristics of Pterocarpus indicus willd . Kasetsart University/Bangkok.