Books by Lyn J. Topinka:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Topinka, Lyn J.: Eruptions of Mount Saint Helens (U.S. Dept. of the Interior, Geological Survey, 1990), also by Robert I. Tilling, Donald A. Swanson, and Geological Survey (U.S.) (page images at HathiTrust)
Find more by Lyn J. Topinka at your library, or elsewhere.