Gupta, O. P. Weedy Aquatic Plants: Their utility, menace and management.
Chicago-viite (17. p.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
MLA-viite (9. p.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
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