Shizen hogo ni kansuru seron chōsa
Subtitle: Shōwa 56-nen 6-gatsu chōsa
Series: Seron chōsa hōkokusho
Publisher: Naikaku Sōri Daijin Kanbō Kōhōshitsu
Published: 1981
Place of publication: [Tokyo]
Language: jpn
Number of pages: 146