Vectors in group change

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035 ‡a(OCoLC)5659747
040 ‡aUniv. of Pennsylvania Libr. ‡cCLE ‡dOCL
050 ‡aHM291 ‡b.R58 1939
082 ‡a301.1523
100 1 ‡aRohrbaugh, Lewis Henry, ‡d1908-
245 1 0 ‡aVectors in group change ‡c[by] Lewis Henry Rohrbaugh.
260 ‡aPhiladelphia, ‡c1940.
300 ‡aiii, 85 p. ‡bdiagrs. ‡c23 cm.
502 ‡aThesis (Ph. D.)--University of Pennsylvania, 1939.
504 ‡a"Selected bibliography": p. 84-85.
538 ‡aMode of access: Internet.
650 0 ‡aSocial psychology.
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