عرض عادي عرض مارك عرض تدوب

Learning the radiotelegraph code / - 9. - 48p. : ill. ; 24 cm.

Subjects--Topical Terms:
Engineering

Index Terms--Genre/Form:
Radio broadcasting.
Radio frequency allocation.
Radio equipment.
Telecommunication codes.

Dewey Class. No.: 621.3842 / L438