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Start Over You searched for: Publish Year Decade 1950 - 1959 Remove constraint Publish Year Decade: 1950 - 1959 Sudoc Stem I 29.21 Remove constraint Sudoc Stem: I 29.21

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71. Glacier Bay National Monument, Alaska.

73. Harpers Ferry National Monument.

74. Hopewell Village National Historic Site, Pa.

76. Lava Beds National Monument, Calif.

77. Lehman Caves National Monument, Nev.

79. Montezuma Castle National Monument, Ariz.