Online Books by
Charles A. Packard
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Packard, Charles A.: Relay engineering : a reference book to guide engineers and others in the selection and use of electromagnetic relays (Struthers-Dunn, 1945), also by inc. Struthers-Dunn (page images at HathiTrust)- Packard, Charles A.: Relay engineering; a reference book to guide engineers and others in the selection and use of electromagnetic relays (Pitman, N.J., 1962), also by Inc Struthers-Dunn (page images at HathiTrust)
- Packard, Charles A.: Relay engineering; a reference book to guide engineers and others in the selection and use of electromagnetic relays (Struthers-Dunn, inc., 1945), also by inc. Struthers-Dunn (page images at HathiTrust)
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