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• 23 Halpern Laotian Slide Collection
• 23 Southeast Asian images & Texts

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• 23 Still image

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• 13 Rivers
• 7 Aerial photographs
• 3 Bridges
• 3 Labor housing
• 3 Roads
• 2 Agriculture
• 2 Airplanes
• 2 Airports
• 2 Ethnic groups
• 2 Laborers
• 2 Machinery
• 2 Tractors
• 1 Houses
• 1 Men
• 1 Soldiers
• 1 Villages

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• 23 Halpern, Joel M. (Joel Martin), 1929-

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• 23 Xaignabouri (Laos : Province)