Null Harold R 1929 Phase equilibrium in process design / [by] Harold R. Null. - New York : Wiley-Interscience, 1970. - xi, 275 p. illus. 23 cm. Includes bibliographies. ISBN: 0471651850 Subjects--Topical Terms: Phase rule and equilibriumChemical processes LC Class. No.: TP156.E65 Dewey Class. No.: 660/.29/63