Human values in the poetry of Robert Frost : a study of a poet's convictions / by George W. Nitchie. Nitchie, George W. (George Wilson), 1921- Frost, Robert, 1874-1963 Ethics. 811 NIH Includes index. Bibliography: p. [224]-230. Durhan, N.C. : Duke University Press, 1960. 1960. 1960 Text ix, 242 p. ; eng