Communications and networks /
Forbes, Jean.
Communications and networks / by Jean Forbes, James Ross. - London : Heinemann Educational, 1978. - 80 p : ill. ; 25 cm. - Place and people ; 3. . - Place and people ; 3. .
Includes index.
0435346946
Communication and traffic.
Transportation.
Communications and networks / by Jean Forbes, James Ross. - London : Heinemann Educational, 1978. - 80 p : ill. ; 25 cm. - Place and people ; 3. . - Place and people ; 3. .
Includes index.
0435346946
Communication and traffic.
Transportation.
