Alexander, D. Principles of emergency planning and management.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlexander, David. Principles of Emergency Planning and Management.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAlexander, David. Principles of Emergency Planning and Management.
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