Kōtsū kikan ni kansuru seron chōsa
Subtitle: Shōwa 56-nen 3-gatsu chōsa.
Series: Seron chōsa hōkokusho 
Publisher: Naikaku Sōri Daijin Kambō Kōhōshitsu
Published: 1981
Place of publication: [Tokyo]
Language: jpn
Number of pages: 137