GEOLOGIC MAP OF THE VEST QUADRANGLE, EASTERN KENTUCKY = CARTE GEOLOGIQUE DE LA FEUILLE VEST, KENTUCKY ORIENTALDANILCHIK W; WALDROP HA.1978; U.S. GEOL. SURV., GEOL. QUADRANGLE MAPS; USA; DA. 1978; GQ1441; 1 CARTE COUL.; CART. GEOL.; ECH. 1:24 000Serial Issue

SURFICIAL GEOLOGIC MAP OF THE PELICAN CONE QUADRANGLE, YELLOWSTONE NATIONAL PARK AND ADJOINING AREA, WYOMING. 1/62500.RICHMOND GM; WALDROP HA.1972; U.S. GEOL. SURV., MISC. GEOL. INVEST. MAP; USA; 1972, NUM. 0638Miscellaneous

GEOLOGY OF THE GARDINER AREA, PARK COUNTY, MONTANA.FRASER GO; WALDROP HA; HYDEN HJ et al.1969; GEOL. SURV. U.S.A., BULL.; USA; 1969, NUM. 1277, P. 1 A 114Miscellaneous