Balakrishnan, M., & Alexander, K. M. (1988). Environmental issues: Problems and solutions. University of Kerala.
シカゴスタイル引用形Balakrishnan, M., , K. M. Alexander. Environmental Issues: Problems and Solutions. Thiruvananthapuram: University of Kerala, 1988.
MLA引用形式Balakrishnan, M., , K. M. Alexander. Environmental Issues: Problems and Solutions. University of Kerala, 1988.
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