Dōro Gijutsu Senmon Iinkai hōkoku, R-7
Subtitle: Iwaki Kokudō Kōji Jimusho no konkurīto hosō
Publisher: Semento Kyōkai
Published: 1988
Place of publication: Tōkyō
Language: jpn
Number of pages: 78
Subjects: Road materials; Asphalt cement