TY - RPRT TI - The use of natural vs. man-modified wetlands by shorebirds and waterbirds AU - R. Michael Erwin AU - Malcolm Coulter AU - H. Cogswell PY - 1986 DO - 10.2307/1521205 UR - https://pubs.usgs.gov/publication/5222139 ID - 5222139 ER -