Keller, E. A., DeVecchio, D. E., & Blodgett, R. H. Natural hazards: Earth's processes as hazards, disasters, and catastrophes (3rd ed.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeller, Edward A., Duane E. DeVecchio, और Robert H. Blodgett. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 3rd ed.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeller, Edward A., et al. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 3rd ed.
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