Gupta, O. P. Weedy Aquatic Plants: Their utility, menace and management.
Tohutoru Kātū Chicago (17th ed.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
Tohutoro MLA (9th ed.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
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