Preeyaphan Udomparsert, Thaveewat Tassanawat, and Thanasorn Thipayarak. “Development of a Computerized Recording System for Measuring the Production Efficiency in Small Dairy Holders II. The Relationship Between Production Cost and Production Indices”. Agriculture and Natural Resources 28, no. 2 (June 30, 1994): 248–255. accessed September 18, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/241400.