PRINCIPLES OF ELECTRICITY APPLIED TO TELEPHONE AND TELEGRAPHY WORK
AMERICAN TELEPHONES
PRINCIPLES OF ELECTRICITY APPLIED TO TELEPHONE AND TELEGRAPHY WORK - AMERICAN TELEPHONES 1930 - 264
621.385 UNI
PRINCIPLES OF ELECTRICITY APPLIED TO TELEPHONE AND TELEGRAPHY WORK - AMERICAN TELEPHONES 1930 - 264
621.385 UNI