TY  - RPRT
TI  - Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols
AU  - D. B. Smith
AU  - L. G. Woodruff
AU  - R. M. O’Leary
AU  - W.F. Cannon
AU  - R. G. Garrett
AU  - J.E. Kilburn
AU  - M. B. Goldhaber
PY  - 2009
DO  - 10.1016/j.apgeochem.2009.04.008
UR  - https://pubs.usgs.gov/publication/70036827
ID  - 70036827
ER  -