00626cam a2200193 4500 513439618 TxAuBib 20010725120000.0 710125s1968||||||||||||||||||||||||eng|u 68024655 TxAuBib Dixon, Franklin W. The secret of the lost tunnel. 29, / by Franklin W. Dixon. New York : Grosset & Dunlap, [1968] 174 p : illus ; 20 cm. Hardy Boys mystery stories, The 20010725. The Hardy Boys mystery stories.