TY - RPRT TI - Challenge theme 7: Information support for management of border security and environmental protection: Chapter 9 in United States-Mexican Borderlands: Facing tomorrow's challenges through USGS science AU - Jean W. Parcher AU - William R. Page PY - 2013 DO - 10.3133/cir13809 UR - https://pubs.usgs.gov/publication/cir13809 ID - cir13809 ER -