Chaisanit, J., Phanphang, S., Somboon, K. and Tuchinda, P. 2022. A study conducted proficiency testing of laboratory test for the compression strength of corrugated fiberboard boxes. Bulletin of Applied Sciences. 6, 6 (Oct. 2022), 101–107. DOI:https://doi.org/10.60136/bas.v6.2017.215.