Annual report.
| Published: | 1939-1965. |
|---|---|
| Item Description: | Description based on 1949. Volumes for 1953- issued as National Research Council Publication 304, 368, 396, 512, 570, 650, 756, 842, 973, 1080, 1141, 1238, 1356. |
| Physical Description: | volumes : illustrations ; 27 cm. |
| Publication Frequency: | Annual |
| ISSN: | 0737-2426 0737-2485 0084-9162 |