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Crystal cave of Pennsylvania: Midway between Reading and Allentown. [Reading, Pa.: Crystal Cave Co., Inc.].
Chicago Style CitationCrystal Cave of Pennsylvania: Midway between Reading and Allentown. [Reading, Pa.: Crystal Cave Co., Inc.].
MLA CitationCrystal Cave of Pennsylvania: Midway between Reading and Allentown. [Reading, Pa.: Crystal Cave Co., Inc.].
Warning: These citations may not always be 100% accurate.