TY - RPRT TI - Natural gamma aeroradioactivity map of parts of the Lambertville, Lumberville, and Stockton quadrangles, New Jersey and Pennsylvania AU - G. R. Boynton AU - D.R. Pettillo AU - G. L. Zandle PY - 1966 DO - 10.3133/gp572 UR - https://pubs.usgs.gov/publication/gp572 ID - gp572 ER -