Structural visualization

Manylion Llyfryddiaeth
Prif Awdur:	O'Connor, Johnson 1891-
Awdur Corfforaethol:	Human engineering laboratory. Characteristics common to engineering executives
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Boston Human engineering laboratory 1943.
Pynciau:	Vocational guidance. Mental tests. Ability > Testing.