Unsolved business problems

Xehetasun bibliografikoak
Egile nagusia:	O'Connor, Johnson 1891-
Erakunde egilea:	Human Engineering Laboratory. Characteristics common to executives
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	[Boston] Human Engineering Laboratory Inc., [1940].
Gaiak:	Executive ability. Ability > Testing.