Japan. Keizai Sangyōshō. Kōkūki Buki Uchū Sangyōka

• Heise 17-nendo hanʼyō gijutsu jittai chōsa hōkokusho (taijin jirai shori gijutsu no dōkō ni kansuru jittai chōsa)
• Heisei 17-nendo hanʼyō gijutsu jittai chōsa hōkokusho