Regan, Louis John (1943) Origin of the Eocene Sands of the Coalinga District, California. The Lower and Middle Eocene Foraminifera of the Coalinga District, California (Dissertation (Ph.D)), California Institute of Technology doi: 10.7907/XFB9-K127 Regan, Louis John (1941) The composition, texture, structure, and probable origin of the "Gatchell" sand (Thesis (Masters)), California Institute of Technology doi: 10.7907/N2K8-7D80 Regan, Louis John (1939) The Geology of a Portion of the Saugus and Red Mountains Quadrangles (Bachelors)), California Institute of Technology doi: 10.7907/4WWA-QF70