PPHP "yutakasa" shihyōPHP "yutakasa" shihyōde Tsuneo Iida, 飯田経夫, PHP Sōgō Kenkyūyjo, PHP 総合硏究所MateriasQuality of lifeSocial conditionsSocial indicatorsEdiciones (1)PHP "yutakasa" shihyō (1993)PHP Kenkyūjo · japonés