TY - RPRT TI - Chemical, physical, biochemical, and bacteriological characteristics at selected stream sites in Puerto Rico, 1975-76 AU - Ferdinand Quinones-Marquez AU - Pedro Vazquez AU - Rafael Pena PY - 1977 DO - 10.3133/ofr77237 UR - https://pubs.usgs.gov/publication/ofr77237 ID - ofr77237 ER -