Hokkaidou shuzou kenkyuukai kaihou

Hokkaidou shuzou kenkyuukai kaihou

Hokuman to hokkaidou nouhou : kaitaku nougyou kenkyuukai houkoku

Hokkaidou shoubou gikai kaihou

Nenryou kokusaku kenkyuukai kaihou

Shuzou kenkyuuhou shiken

Hokkaidou shushi

Hokkaidou jinzou sekiyu kabushiki gaisha rumoi kenkyuujo kenkyuu jikken seiseki houkoku

Touhoku shuzou gaisetsu

Nouji kenkyuukai houkoku

Roudou shintaisei kenkyuu : shouwa kenkyuukai roudou mondai kenkyuukai houkoku

Nishinihonkai suisan seizou kenkyuukai youroku

Kaihou kenkyuu

Kaihou kenkyuu

Kaihou kenkyuu

Kaihou kenkyuu

Kokusaku kenkyuukai houkokusho

Kokusaku kenkyuukai houkokusho

Kaneisen kenkyuukai houkoku

Kokusaku kenkyuukai houkokusho

Kyouka kenkyuukai kenkyuuroku

Youkei kenkyuukai

Hokkaidou bussan kyoushinkai houkoku

Hokkaidou bussan kyoushinkai houkoku

Zenkoku shuzou kumiai rengoukai houkoku