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Author : Purnanto, Nikko Edistya. Publisher ...... Some phonological problems 
and remedial exercises in teaching English to Toba Batak students / F. Peris 
Lubis.							
Author : Purnanto, Nikko Edistya. Publisher ...... Some phonological problems 
and remedial exercises in teaching English to Toba Batak students / F. Peris 
Lubis.