TY - RPRT TI - Determination of the depth to the surfaces of active lava lakes at Mauna Ulu and Alae, Kilauea Volcano, Hawaii AU - R.I. Tilling AU - R.L. Christiansen AU - W. A. Duffield AU - R. T. Holcomb AU - D. W. Peterson PY - 1986 DO - 10.3133/ofr86367 UR - https://pubs.usgs.gov/publication/ofr86367 ID - ofr86367 ER -