THE PORTSMOUTH SEMAPHORE
The Mariner's Mirror ; 25 , 3 ; 300-305
01.01.1939
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Engineering Index Backfile | 1930
British Library Conference Proceedings | 2000
|TIBKAT | 1965
|Engineering Index Backfile | 1899
Long's electrical Semaphore railroad signal
Engineering Index Backfile | 1888