2024 - DEC http://elearn.psgcas.ac.in:8080/jspui/handle/123456789/2050 Tue, 24 Mar 2026 13:41:06 GMT 2026-03-24T13:41:06Z ENVIRONMENTAL SCIENCE http://elearn.psgcas.ac.in:8080/jspui/handle/123456789/2051 ENVIRONMENTAL SCIENCE Thu, 13 Mar 2025 00:00:00 GMT http://elearn.psgcas.ac.in:8080/jspui/handle/123456789/2051 2025-03-13T00:00:00Z