TY  - JOUR
AU  - , 
AU  - , 
AU  - , 
AU  - , 
AU  - , 
TI  - Analysis of urban vulnerability passive defense in regional Cities a case study in Gorgan
JO  - Geography
VL  - 15
IS  - 52
SP  - 0
EP  - 0
PY  - 2019
DO  - 
ER  -