Nihon juukougyou jiritsu o kidouteki jouken to suru nichimanshi senji keizai chousa jisshi youkou

Nihon senji juukougyou jiritsusei kakuritsu o chuushin to suru chousa : shouwa juuroku nendo chousa youkou

Nihon senji juukougyou jiritsusei kakuritsu no tameno chousa youkou

Shina shijou o chuushin to suru nichi doku i no keizai kankei