- 1Costly Errors : A discussion of methods and apparatus employed in timing toll, messages in telephone exchanges
New York: Abbott 1898; 33 S. : Ill.
Telefon; Zeitmessung; Fernsprechanlage - 2A. E. Durrant
The Steam Locomotives of Eastern Europe
Devon: Abbot 1966; 160 S. : Ill., graph. Darst.
Eisenbahn; Osteuropa; Dampflokomotive