Unsolved business problems

Manylion Llyfryddiaeth
Prif Awdur:	O'Connor, Johnson 1891-
Awdur Corfforaethol:	Human Engineering Laboratory. Characteristics common to executives
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	[Boston] Human Engineering Laboratory Inc., [1940].
Pynciau:	Executive ability. Ability > Testing.