Book: The Shattered Helmet (The Hardy Boys, No. 52) - Grosset & Dunlap

eBooks: Hardy Boys 52: The Shattered Helmet - Grosset & Dunlap

Book: Hardy Boys 52: The Shattered Helmet by Dixon, Franklin W. published by Grosset & Dunlap Library Binding - Grosset & Dunlap

Book: Shattered Helmet, The Hardy Boys Series # 52 - Grosset & Dunlap

Book: The Hardy Boys (Vols. 52-56) - Grosset & Dunlap

Book: The Shattered Helmet [Hardy Boys Mystery Stories, No. 52] - Grosset & Dunlap

Book: The Hardy Boys: The Shattered Helmet #52 (The Hardy Boys Series, 52)

Book: THE HARDY BOYS Books Unboxed Set #52-57 (52 The Shattered Helmet, 53 The Clue of the Hissing Serpent, 54 The Mysterious Caravan, 55 The Witchmasters Key, 56 The Jungle Pyramid, and 57 The Firebird Rocket) - Grosset & Dunlap

Book: The HARDY BOYS CASEFILES COLLECTORS EDITION: (48 ROCK N REVENGE/ 51 CHOKE HOLD/ 52 UNCIVIL WAR) - Simon Pulse

Book: The Hardy Boys Assorted Volumes Set #3 (The Hardy Boys, Vols. 15, 50, 51, 52.) - Grosset & Dunlap

Book: Hardy Boys Casefiles Partial Set (Cases: 6,26,53,74,76,79,87,93,99, Cases: 1,6,7,8 (HC),10,12,14,15,16,17,18,20,21,22,24,25,26,28,29,30,32,33,34,35,36,37,42,43,44,45,47,49,51,52,53,54,44,56,62,70,76,81,84,86,95.)

Book: Set of 2 Franklin W. Dixon Hardy Boys Mystery Novels: #47 Mystery of the Whale Tattoo and #52 The Shattered Helmet - Grossett & Dunlap

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