00850nam a2200181Ia 450000100070000000500170000700800410002404000100006508200290007511000490010424501260015326000810027930000610036050400510042165000670047265000550053965000740059425102720160527185923.0010927e        xxu    gr     000 0 eng d  aPUCPR00221a363.742bU586 NPS: r1 aUnited StatesbNational Park Service.2Local10aReport on effects of aircraft overflights on the national park systembexecutive summary, report to Congress, appendixes.  a(Washington, D.C.)bU.S. Dept. of the Interior, National Park Servicec1995.  axix, 328 p.bill. (some col.) , maps (some col.)c28 cm.  aIncludes bibliographical references and index. 0aAirplanesxNoisexEnvironmental aspectszUnited States.2Local 0aNational parks and reserveszUnited States.2Local 0aAeronautics, CommercialxEnvironmental aspectszUnited States.2Local