TY - BOOK ID - 145624720 TI - Ulmus americana 'Valley Forge' and 'New Harmony' PY - 2002 PB - Washington DC : U.S. National Arboretum, U.S. Dept. of Agriculture, Agricultural Research Service, DB - UniCat KW - Elm KW - American elm KW - Ulmaceae KW - Plants, Ornamental KW - Varieties KW - Varieties KW - Varieties KW - Varieties UR - https://www.unicat.be/uniCat?func=search&query=sysid:145624720 AB - ER -