Borehole and geohydrologic data for test hole USW UZ-6, Yucca Mountain area, Nye County, Nevada [microform] by Merrick S. Whitfield, Jr., Colleen M. Cope and Carole L. Loskot ; prepared in cooperation with the U.S. Department of Energy, Nevada Field Office, under Interagency agreement DE-A108-78ET44802