please send me the detail information about the gum copal, dammar, sandarac and gum mastic, I am working on these gums for my Ph.D. topic so please send me the possible information to my end

Manoj S. charde, UDPS 27,adarsh Nagar, Mangal Dham Society, Khadgaon Road, Wadi, Nagpur - 440023, M.S. India

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