Greetings all - Anyone got recommendations as to a comprehensive, accurate key - or keys - for freshwater bivalves and gastropods that would cover taxa occurring in Pennsylvania?
Much obliged - Brian Brian A. Chalfant | -ologist Pennsylvania Department of Environmental Protection Rachel Carson State Office Building 400 Market Street | Harrisburg, PA 17101 Phone: 717.787.9639 | Fax: 717.772.3249 www.depweb.state.pa.us<http://www.depweb.state.pa.us/>
