Professional papers. 305-B. Test wells, Umiat area, Alaska [with list of literature cited], by Florence Rucker Collins; with Micropaleontologic study of Umiat field, northern Alaska [with Bibliography of Micropaleontologic study], by Harlan R. Bergquist; and sections on Temperature measurement studies, by Max C. Brewer; and Core analyses, Umiat test well 9, by George L. Gates.