 | Phelps, Robert B. (Robert Bridger), 1930- 4n | (2) |
 |
 | Phelps, Robert B. (Robert Bridger), 1930- 4n; Wood products used in single-family houses inspected by the Federal Housing Administration, 1959 and 1962 / Robert B. Phelps. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1966 | |
| Phelps, Robert B. (Robert Bridger), 1930- 4n; Wood products used in single-family houses inspected by the Federal Housing Administration, 1959, 1962, and 1968 / Robert B. Phelps. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1970. | |
|