Yoka no kōdō kijun tō ni kansuru chōsa kekka hōkokusho
By: [henshū, Nagano-ken Shakaibu Rōseika Rōdō Kagaku Kenkyūshitsu].
Series: Rōken chōsa hōkoku ; dai 43-gō
Publisher: Dō Shakaibu
Published: 1975
Place of publication: Nagano
Language: jpn
Number of pages: 291