Richard Wilbur, by Donald L. Hill. Hill, Donald Louis, 1914- Wilbur, Richard, 1921- PS3545.I32165 Z69 813.54 HIL Bibliography: p. 183-186. New York, Twayne Publishers [1967] [1967] 1967 Text 192 p. eng Twayne's United States authors series, TUSAS 117 Twayne's United States authors series ; TUSAS 117