Engineer and inventor: In memoriam Heilmuth Walter
Schiff & Hafen ; 52 , 8 ; 60-63
2000
Aufsatz (Zeitschrift)
Deutsch
Engineer and inventor: In memoriam Hellmuth Walter
British Library Online Contents | 2000
George Forbes: Carbon Brush Inventor
IEEE | 1986
|Agricultural idea by young inventor
Engineering Index Backfile | 1965