Books by E. L. Mack:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Mack, E. L. (Edward Lawrence), 1890-: Experimental production of alloy steels (Govt. print. off., 1922), also by H. W. Gillett (page images at HathiTrust)
Find more by E. L. Mack at your library, or elsewhere.