Gross heating value of various shade-trees wood in coffee plantation in Costa Rica and its relation with extractives and specific gravity: : Gross heating value of various shade-trees wood in coffee plantation. PP [Internet]. 2018 Dec. 31 [cited 2026 Apr. 30];34(3):183-90. Available from: https://mail.ccrjournal.com/index.php/ccrj/article/view/311