Yazar
Roy Willmarth Kelly
5 cilt bulundu.
Cilt sonuçları
Training Industrial Workers
Roy Willmarth Kelly · Ronald Press
453 sayfa · 1920
Technical education / Industrial Efficiency / Employees / Training of
Training industrial workers
Roy Willmarth Kelly · The Ronald press company
566 sayfa · 1919
Technical education / Industrial efficiency / Business and education / Manual training
Training industrial works
Roy Willmarth Kelly · The Ronald Press Company
437 sayfa · 1920
Technical education / Industrial efficiency