Marginal punched cards in college and research libraries.
| Author/creator | McGaw, Howard F, 1911- |
| Format | Book |
| Publication Info | Washington : Scarecrow Press, 1952. |
| Description | 218 pages : illustrations ; 23 cm |
| Subjects |
| Bibliography note | Bibliography: p. 203-208. |
| LCCN | 52007846 |