TY - BOOK ID - 135432474 TI - Molt and aging criteria for four North American grassland passerines AU - Pyle, Peter AU - Jones, Stephanie L. AU - Ruth, Janet M. AU - U.S. Fish and Wildlife Service. PY - 2008 PB - Shepherdstown, WV : U.S. Fish & Wildlife Service, DB - UniCat KW - Passeriformes KW - Molting. KW - Age determination KW - Physiology UR - https://www.unicat.be/uniCat?func=search&query=sysid:135432474 AB - ER -