Jain, N. C., Gupta, R. C. and Jain, D. K. (1971) “Tannin Rich Materials as Partial-substitutes for Phenol/Extenders in Making Phenol-Formaldehyde Resin for Plywood”, Indian Forester, 97(3), pp. 145–148. doi: 10.36808/if/1971/v97i3/26396.