E. Yuliati Yovi, D. Prasetiana, and N. Aquilla Nirmalasari, “WORK MEASUREMENT STUDY ON MOTOR-MANUAL PINE TAPPING OPERATION: THE APPLICATION OF THE CONCEPT OF LEAN MANUFACTURING AND ALLOWANCES”, Ina.J.For.Res, vol. 8, no. 1, pp. 111–125, Apr. 2021.