A field guide to the forest trees of Brunei Darussalam and the northwest Borneo hotspot - Ashton, Peter S.; Kamariah, A. S.; Said, Idris Mohd (University of Brunei Darussalam in association with Brunei Forestry Department : Brunei Shell Petroleum Co. Sendirian Berhad : Sultan Haji Hassanal Bolkiah Foundation, 2003)