Singhal RM, Sharma SD. Infra-red Spectroscopy of the Soil Humic Acids of the Sal (<I>Shorea robusta</I>) Forests of Doon Valley. Indian Forester [Internet]. 1979 Sep. 1 [cited 2025 Dec. 5];105(9):658-63. Available from: http://indianforester.co.in/index.php/indianforester/article/view/11359