Engelhardia rigida

References

1. [1]Tree Flora of Sabah and Sarawak Vols 1 - 6 — Soepadmo E.; Saw L.G.; Chung R.C.K. (Editors) · Forest Research Institute Malaysia; Kuala Lumpur. · 2002 · ISBN 983-2181-27-5 ↩︎A flora of the woody plants of Sabah and Sarawak on the island of Borneo, often giving details of plant uses.
2. [2]Guide to the Trees of Papua New Guinea — Conn. B.J. & Damas. K.Q. · http://www.pngplants.org/PNGtrees/ ↩︎An Internet site giving good descriptions of the trees of Papua New Guinea.
3. [3]IUCN Red List of Threatened Species — http://www.iucnredlist.org/ ↩︎A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
4. [4]Identification and utilization of lesser-known commercial timbers in Peninsular Malaysia 6 — Lim S.C. & Gan K.S. · Forest Research Institute; Malaysia · 2006 · http://www.frim.gov.my/?page_id=1842 · ISBN 139-258 ↩︎Part of an excellent series of publications, this one giving a brief guide to four lesser known groups of commercial timbers from southeast Asia. It is available in PDF format on the Internet.