Philippine Institute of Volcanology and Seismology <br/><br/>
Operation Mayon :  a contingency plan for Mayon Volcano. 

 - Quezon City :  PHIVOLCS Press,  1990. 
 - 38 p. : ill., maps (1 col.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mayon (Mount)<br/>Volcanoes--Philippines