TY - BOOK T1 - The combination of flight count and control time as a new metric of air traffic control activity DA - [1998] CY - Washington, D.C. : CY - Springfield, Va. : AU - Mills, Scott H. CN - TD 4.210: PB - U.S. Dept. of Transportation, Federal Aviation Administration, Office of Aviation Medicine ; PB - Available to the public through the National Technical Information Service, PP - Washington, D.C. : PP - Springfield, Va. : PY - [1998] N1 - Shipping list no.: 98-0946-M. ID - 248459 KW - Air traffic control TI - The combination of flight count and control time as a new metric of air traffic control activity ER -