References  F. Caracena,  R. L.  Holle, and C. A. Doswell III, Micro bursts -A  Handbook For Visual Identification, U.S. Department Of  ’"  .Commerce, February, 1989  "• •  Federal Aviation Administration Accident Prevention Program, The  Impossible Turn, U.S. Department of Transportation  Federal Aviation Administration Accident Prevention Pro grain,  Wind Shear, U.S. Department of Transportation  Colorado Pilots Association, Colorado Mountain Flying Course  Northwest Mountain Region, Denver Air Route Traffic Control  Center, High Mountain Flying In Ski Country U.S.A.  Advisory Circular AC-0057, Hazardous Mountain Winds and their  Visual Indicators  Advisory Circular AC 61-23C, Pilot’s Handbook of Aeronautical  Knowledge  FAA-P-87 40-2, Density Altitude  FAA-P-8740-5, Weight and Balance, An Important Safety  Consideration for Pilots  FAA-P-87 40-13, Engine Operation for Pilots  16 