REFERENCES
1.
Personal communication with Mr. J. Haley, Pullman-Swindell, Pittsburgh,
Pennsylvania.
13 March 1979 •
. 2.
Personal communication with Mr. J. Galbreath, Whiting Corp., Harvey,
Illinois.
13 March 1979.
3.
U.S. Steel.
The Making, Shaping and Treating of Steel.
Herbick and
Held. Pittsbur'gh, .Pennsylvania.
1971.
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