ID:DA01701113
Helfert, Erich Anton
ヘルファート, エリック A.（ヘルファート, エリック A.）
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by Erich A. Helfert, Eleanor G. May, Malcolm P. McNair
UMI 1965 [Facsim. ed.]
Available at 1 libraries
by Erich A. Helfert, Eleanor G. May and Malcolm P. McNair
Division of Research, Graduate School of Business Administration, Harvard Univ. c1965
Available at 21 libraries
ed. by Erich A Helfert
R.D. Irwin 1963
Available at 17 libraries
