TY  - JOUR
PY  - 1975//
TI  - Survey of national emergency telephone number systems; operational characteristics of 911 systems
JO  - Hospital progress
A1  - Prybil, L. D.
SP  - 64
EP  - 69
VL  - 56
IS  - 5
N2  - <p>[Abstract unavailable]</p> <p>Language: en</p> 
LA  - en
SN  - 0018-5817
UR  - http://dx.doi.org/
ID  - ref1
ER  -