TY  - BOOK
AU  - Twitchell,Karl Saben
TI  - Keith Arnold in mining engineering
AV  - PZ7.T9 
PY  - 1955///
CY  - New York
PB  - Dodd, Mead
UR  - http://www.archive.org/details/keitharnoldinmin00twit
UR  - http://www.openlibrary.org/books/OL24535516M
ER  -