Studies on Some Poly-Hetroconjugated Systems Obtained from Urea and Dicyanodiamide http://127.0.0.1/xmlui/handle/123456789/678 2026-04-18T14:01:48Z 2026-04-18T14:01:48Z Studies on Some Poly-Hetroconjugated Systems Obtained from Urea and Dicyanodiamide Das, Asok Kumar http://127.0.0.1/xmlui/handle/123456789/679 2024-05-02T11:06:16Z 1970-01-01T00:00:00Z Studies on Some Poly-Hetroconjugated Systems Obtained from Urea and Dicyanodiamide Das, Asok Kumar 1970-01-01T00:00:00Z