Parker, Martin F.
The practical guide to voice mail - Berkeley, Calif. : McGraw-Hill, 1987 - 306
COMMUNICATION IN BUSINESS
COMMUNICATION IN ORGANIZATIONS
TELEPHONE IN BUSINESS
VOICE MAIL SYSTEMS
HF5541 .T4 / P374P
The practical guide to voice mail - Berkeley, Calif. : McGraw-Hill, 1987 - 306
COMMUNICATION IN BUSINESS
COMMUNICATION IN ORGANIZATIONS
TELEPHONE IN BUSINESS
VOICE MAIL SYSTEMS
HF5541 .T4 / P374P