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TI  - à¸§à¸à¸ªà¸²à¸£ : à¸à¸µà¸à¸µà¹ 49 à¸à¸à¸±à¸à¸à¸µà¹ 4 à¸à¸¸à¸¥à¸²à¸à¸¡ - à¸à¸±à¸à¸§à¸²à¸à¸¡ 2534 =: The Vanasarn vol.49 No.4 October - December 1991
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