土地改良事業における外部経済効果の算定事例
A Study of External Benefts of Cost-Benefit Analysis for Land Improvement Projects

Shinji TOMITA, Yuta OZAWA
2009 Journal of the Japanese Society of Irrigation, Drainage and Rural Engineering  
doi:10.11408/jjsidre.77.3_173 fatcat:plxe3r3kpvg5hh65jnof2rgz4i