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Hutabarat, Julianus and Ruwana, Iftitah and Gustopo Setiadjit, Dayal and Mustiadi, Lalu and Mulyanto, Anggadwi (2016) THE EFFECT OF STRETCHING AND AGE TOWARD MENTAL WORKLOAD OF CITY CAR TRANSPORTATION DRIVER. I J A B E R, 14 (14). ISSN 1031-1041