TY - RPRT TI - Effectiveness of fish screens in protecting lamprey (Entosphenus and Lampetra spp.) ammocoetes—Pilot testing of variable screen angle AU - Theresa L. Liedtke AU - Daniel J. Didricksen AU - Lisa K. Weiland AU - Joshua A. Ragala AU - Ralph Lampman PY - 2019 DO - 10.3133/ofr20191044 UR - https://pubs.usgs.gov/publication/ofr20191044 ID - ofr20191044 ER -