Pornanan Boonkorn, Angkhana Chuajedton, and Weeranuch Karuehanon. 2020. “THE CRUDE TANNIN EXTRACTION FROM WOOD SCRAP WASTES FOR PROLONGING THE SHELF LIFE OF LITCHI FRUITS”. GEOMATE Journal 18 (67):208-13. https://geomatejournal.com/geomate/article/view/530.