00372nam a2200133la 450000500170000000800370001702000150005405000230006910000190009224500680011125000060017926000450018530000080023020260128043415.0251201s9999    xx        000 0 und d  a9041104976  aTL 723.3bSCH 1998  aWalter Schwenk  aAspects of international co-operation in air traffic management  a-  aHaguebMartinus Nijhoff Publishersc1998  a309