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Ismail, Ujang Paman and Inaba, S. and Uchida, S. (2016) Economic Aspects of Machinery Hire Services Managed by Farmer Groups in Kampar Regency, Indonesia. Applied Engineering in Agriculture, 32 (2). pp. 169-179. ISSN 0883− 8542
Ismail, Ujang Paman and Inaba, S. and Uchida, S. (2014) Farm Machinery Hire Services For Small Farms In Kampar Regency, Riau Province, Indonesia. Applied Engineering in Agriculture, 30 (5). pp. 699-705. ISSN 0883− 8542 (In Press)
Ismail, Ujang Paman and Inaba, S. and Uchida, S. (2012) Determining Mechanization Capacity and Time Requirement for Farm Opera-tions: A Case of Small-Scale Rice Mechanization in Riau Province, Indonesia. Applied Engineering in Agriculture (3). pp. 333-338. ISSN 0883− 8542
Paman, Ujang and Uchida, S. and Inaba, S. and Kojima, T. (2008) Factors Affecting Repair Costs of Small Tractor Use in Riau Province, Indonesia. Tropical Agriculture (Trinidad), 85 (2). pp. 142-148. ISSN 0041-3216 (In Press)
