Michael D. Bilger

• A checklist of the aquatic invertebrates of the Delaware River Basin, 1990-2000
• Fish communities and their relation to physical and chemical characteristics of streams from selected environmental settings in the Lower Susquehanna River Basin, 1993-95
• Merrimack River
• Nashua River
• Occurrence of organochlorine compounds in whole fish tissue from streams of the lower Susquehanna River Basin, Pennsylvania and Maryland, 1992