00257nam a2200097Ia 4500008004000000082001600040100002200056245002500078260004800103300000800151210210b1950   xxu||||| |||| 00| 0 eng d  a823.91 DUFO  aDUFF (Douglas V).  aOn the world's roof.  aLondon.bAbbey Rewards Cresta House.,c1950  a200