"Full Issue: 1964, Volume 2, Issue 2,"
Journal of the Institute for Research:
2, Article 3.
Available at: http://digitalcommons.spu.edu/jir/vol2/iss2/3
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Work is in the public domain the United States, since it was published from 1962-1969 without proper copyright notice. Copyright could apply outside the U.S. and has not been determined.