TY - BOOK ID - 14388199 TI - Endangered and threatened plants of the United States AU - Ayensu, Edwards S. AU - DeFilipps, Robert A. AU - US National Museum of Natural History AU - World Wildlife Fund for Nature ( WWF ) PY - 1978 SN - 0874742226 PB - Washington DB - UniCat KW - AMN North America KW - North America KW - USA KW - endangered plants KW - plant conservation KW - rare plants UR - https://www.unicat.be/uniCat?func=search&query=sysid:14388199 AB - ER -