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Ian M. Hapsias: US Gypsum Borrego Springs CA
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Ian M. Hapsias: US Gypsum Plaster City CA
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Ian M. Hapsias: US Gypsum - Anza Borrego Desert CA
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Ian M. Hapsias: US Gypsum Railroad - Anza Borrego Desert CA
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Ian M. Hapsias: US Gypsum Railway - Anza Borrego Desert CA
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Ian M. Hapsias: Narrow Gauge in the Desert
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Ian M. Hapsias: Ocotillo Bloom