Emergency communication systems.

[NT 60487] Overview

[NT 60478] Works:	2 [NT 60520] works in 2 [NT 60521] publications in 1 [NT 60522] languages

[NT 60480] Titles

Mass notification and crisis communications : planning, preparedness, and systems [NT 59711] by: Walker, Denise C. ([NT 1579] Language materials, printed)

Crisis information management : communication and technologies [NT 59711] by: Hagar, Christine. ([NT 8598] Electronic resources)