TY - RPRT TI - Ground magnenometer surveys over known and suspected breccia pipes on the Coconino Plateau, northwestern Arizona AU - B. S. Van Gosen AU - K. J. Wenrich AU - W. L. computer graphics by Thoen PY - 1989 DO - 10.3133/b1683c UR - https://pubs.usgs.gov/publication/b1683C ID - b1683C ER -