STRATIGRAPHIC FRAMEWORK OF PRECAMBRIEN AND LOWER AND MIDDLE PALEOZOIC ROCKS IN THE SUBSURFACE OF NEBRASKA.CARLSON MP.1970; DISSERT. ABSTR. INTERNATION., B; USA; 1970(3), VOL. 30, NUM. 0009Miscellaneous

GEOLOGY, GEOLOGIC TIME, AND NEBRASKA AS PRESENTED AT THE FOURTH GRADE LEVEL. (ABSTRACT).CARLSON MP.1969; PROC.NEBRASKA.ACAD.SCI.AFFIL.SOC-ANNU.MEET; USA; 1969(4), VOL. 79Miscellaneous

DEVONIAN OF THE NORTH-CENTRAL REGION,UNITED STATES.COLLINSON C; BECKER LE; JAMES GW et al.1967; INTERNAT.SYMPOSIUM.ON.THE.DEVONIAN.SYSTEM.CALGARY.; 1967, VOL. 1, P. 933 A 971Miscellaneous