Sekiyu sangyō no kenkyū IV
Subtitle: sekiyu seihin no jukyū taiyō
By: Sekiyu Mondai Kenkyūkai hen
Series: Kenkyū sankō shiryō -- 129; Kenkyū sankō shiryō -- dai 129-shū.
Publisher: Ajia Keizai Kenkyūjo
Published: 1967
Place of publication: Tōkyō
Language: jpn
Number of pages: 176
Other titles: Sekiyu seihin no jukyū taiyō
Notes: Includes bibliographical references.