Gupta, O. P. Weedy Aquatic Plants: Their utility, menace and management.
Cita Chicago (17th ed.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
Cita MLA (9th ed.)Gupta, O. P.1933-. Weedy Aquatic Plants: Their Utility, Menace and Management.
Atenció: Aquestes cites poden no estar 100% correctes.