TY  - BOOK
AU  - Larsen,Egon
TI  - A history of inventions : volume III : communications
U1  - 621 L334A 1976 
PY  - 1976///
CY  - Lahore
PB  - Ferozsons ltd., 
KW  - Development in Technology
KW  - Invention
KW  - History
KW  - Technologies -- Inventions -- Rebot
N1  - Index
ER  -