Tree rings : timekeepers of the past / [by R.L. Phipps and J. McGowan].
| Author/creator | Phipps, Richard L., 1935- |
| Other author | McGowan, J. |
| Other author | Geological Survey (U.S.) |
| Format | Book |
| Publication Info | [Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey : [Washington, D.C.] : [Supt. of Docs., U.S. G.P.O., distributor], [1994] |
| Description | 15 pages : illustrations ; 23 x 10 cm |
| Subjects |
| General note | Shipping list no.: 94-0418-P. |
| GPO item number | 0621 |
| Govt. docs number | I 19.2:T 71/994 |