TY - BOOK AU - Piersol,Robert James TI - Electric condenser process for demulsifying oil, AV - TP690 .P5 PY - 1933/// CY - Urbana, Ill. PB - printed by authority of the state of Illinois KW - Petroleum N1 - At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey; Bibliography: p. 30-38 ER -