01020    a2200193   4500001000700000020001800007020000900025041000800034082001000042245003500052246003200087490003500119520053800154856002400692040002500716260003700741300001700778700003100795118599  a9780448089126  qenc.  aeng  a[Fic]10aThe Hardy boys mystery stories  aFootprints under the window  aThe Hardy boys mystery stories  aA plot to steal a top-secret instrument vital to the United States space program poses a challenging case for Frank and Joe Hardy. After rescuing a South American stowaway who mutters a warning about "Footprints " and then vanishes, Frank and Joe discover that documents belonging to their famous detective father are missing and that footprints linger under a window. The young detective's search for the diabolical mastermind of the "Footprints" spy ring takes them on a flight to a group of islands off the coast of South America.  u000031/00003156.jpg  aBR-BrIDEAcBR-BrIDEA  aNew YorkbGrosset & Dunlapc1993  a180 p.bill.  aDixon, Franklin W.eauthor