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Sharma, O.P. and Dobhal, N.P. 1969. A Preliminary Note on Variation in Catechin Content of <I>Acacia catechu</I> Tree with its Age in the Siwalik Forest Division of the Uttar Pradesh Forests. Indian Forester. 95, 9 (Sep. 1969), 650–652. DOI:https://doi.org/10.36808/if/1969/v95i9/26158.