- & FROST, S. [. (1971). Masterworks of philosophy vol. 1. McGraw-Hill Bo. Co.

- and S.E. [Ed.] FROST. Masterworks of Philosophy Vol. 1. New York: McGraw-Hill Bo. Co, 1971.

- and S.E. [Ed.] FROST. Masterworks of Philosophy Vol. 1. McGraw-Hill Bo. Co, 1971.