Lopachoke Thawornwong. 1994. Studies on the characteristics of work load in forest operations : comparison between muscular work and skilled work. [Hiruzen:Tottori University];
Lopachoke Thawornwong. (1994) Studies on the characteristics of work load in forest operations : comparison between muscular work and skilled work (รายงานผลงานวิจัย). Tottori University]:[Hiruzen.
Lopachoke Thawornwong. Studies on the characteristics of work load in forest operations : comparison between muscular work and skilled work. [Hiruzen:Tottori University], 1994.
Lopachoke Thawornwong. (1994) Studies on the characteristics of work load in forest operations : comparison between muscular work and skilled work (รายงานผลงานวิจัย). Tottori University]:[Hiruzen.