TY - BOOK AU - Dixon,Franklin W. TI - The secret of the old mill T2 - Hardy boys mystery stories SN - 0448089033 (trade) U1 - [Fic] 22 PY - 1990/// CY - New York PB - Grosset & Dunlap KW - Counterfeits and counterfeiting KW - Juvenile fiction KW - National security KW - Fiction KW - Mystery and detective stories KW - sears KW - Mystery fiction KW - gsafd N1 - 4.8; Follett Library Resources; 5-8; Follett Library Resources N2 - Frank and Joe unravel two mysteries, one involving a counterfeiting case and the other concerned with a national security case on which their father is working ER -