found: Kolata, D. R. The Sandwich Fault Zone of northern Illinois, 1978 (a.e.)t.p. (Janis D. Treworgy)
found: Kolata, D. R. Structural framework of the Mississippi embayment of southern Ill., 1981:t.p. (J. D. Treworgy; Ill. St. Geol. Survey, Urbana) [info. from GPO]
found: Wikipedia, Jun. 1, 2022(Janis Driver Treworgy; b. Santa Monica, Calif.; American academic, Paleozoic stratigrapher, sedimentary geologist)
found: Find a grave website, Jun. 1, 2022(Janis Somers Driver Treworgy; b. Feb. 6, 1954; d. Apr. 7, 2015, Elsah, Ill.)