50問
Subtitle: kore ga kakushin da!
By: [henshū Okamoto Atsushi]
Series: Sekai -- dai 687-gō; Sekai (Iwanami Shoten) -- dai 675-gō
Publisher: Iwanami Shoten
Published: 2001
Place of publication: Tōkyō
Language: jpn
Number of pages: 217
Subjects: Questions and answers; Environmental degradation; Miscellanea; Science; World politics; Economic policy
Other titles: 50 mon
Notes: Cover title.

"Bessatsu."

Includes index.