Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kusaka Koji,Skill shortage-Our strategies as an example,Journal of the Japanese Association for Petroleum Technology,0370-9868,The Japanese Association for Petroleum Technology,2008,73,5,383-388,https://cir.nii.ac.jp/crid/1390282679039074048,https://doi.org/10.3720/japt.73.383