TY  - RPRT
TI  - Helium soil gas survey of several collapse features and breccia pipes on the Hualapai Indian Reservation, Arizona
AU  - G. Michael Reimer
AU  - Josh M. Been
PY  - 1987
DO  - 10.3133/ofr8714
UR  - https://pubs.usgs.gov/publication/ofr8714
ID  - ofr8714
ER  -