Scientifically speaking,
@Book{av-1,
  title = 	 "Scientifically speaking",
  publisher = 	 "BBC London",
  year = 	 1976,
  volume =       "1: Scientifically speaking(textbook),
                  2.1: Scientiffically speaking(lesson1-5),
                  2.2: Scientiffically speaking(lesson6-10),
                  2.3: Scientiffically speaking(lesson11-12)",
  note =         "book & cassette"
}

Drills & oral exercises for getting on in English,
@Book{av-2,
  title = 	 "Drills & oral exercises for getting on in English",
  publisher = 	 "BBC London",
  year = 	 1974,
  volume =       "1: Drills for getting on in English(textbook),
                  2.1: Getting on in English(lesson1-14),
                  2.2: Getting on in English(lesson15-29),
                  2.3: Getting on in English(lesson30-40),
                  3.1: Drills & oral exercises(lesson1-5),
                  3.2: Drrils & oral exercises(lesson6-9),
                  3.3: Drrils & oral exercises(lesson10-15),
                  3.4: Drrils & oral exercises(lesson16-20),
                  3.5: Drrils & oral exercises(lesson21-25),
                  3.6: Drrils & oral exercises(lesson27-30),
                  3.7: Drrils & oral exercises(lesson33-36),
                  3.8: Drrils & oral exercises(lesson37-40)",
  note =         "book & cassette"
}

English for the computer age,
@Book{av-3,
  title = 	 "English for the computer age",
  volume =	 "1: Book2(lesson1-4),   2: Book2(lesson5-8),
                  3: Book2(lesson9-16),  4: Book2(lesson17-20),
                  5: Book3(lesson1-8),   6: Book3(lesson9-16),
                  7: Book3(lesson17-20), 8: Book4(lesson1-8),
                  9: Book4(lesson9-16),  10: Book4(lesson17-20)",
  note =         "cassette"
}

Intensive course in English : Specialized studies 131-140,
@Book{av-4,
  title = 	 "Intensive course in English : Specialized studies 131-140",
  publisher = 	 "English language services",
  year = 	 1968,
  volume =	 "1: Intensive course in English(textbook),
                  2.1: LL cassette tapes(131-140),
                  2.2: LL cassette tapes(141-150)",
  note =	 "book & cassette"
}

「超電動スーパーコンピュータをめざして」 : 後藤磁束量子 情報プロジェクトの記録,
@Book{av-5,
  title = 	 "「超電動スーパーコンピュータをめざして」 : 後藤磁束量子
		  情報プロジェクトの記録",
  publisher = 	 "後藤研究室",
  year = 	 "??",
  note =	 "video cassette"
}

Prof. Wilkes 講演会,
@Book{av-6,
  title = 	 "Prof. Wilkes 講演会",
  year = 	 1975,
  volume =	 "1: 1975.9.1分, 2: 1975.9.3分",
  note =         "cassette"
}

高橋先生最終講義,
@Book{av-7,
  title = 	 "高橋先生最終講義",
  year = 	 1975,
  volume =	 "1: 1975.3.14分,       2: 1975.3.20分,
                  3: ECM21*2→D4500-1,  4: ECM21*2→D4500-2,
                  5: ECM99A→RS275DU-1, 6: ECM99A→RS275DU-2",
  note =         "cassette"
}

TOEFL MOCK TEST,
@Book{av-8,
  title = 	 "TOEFL MOCK TEST",
  volume =	 "1: TAT-01-25, 2: TAT-01-27,   3: TAT-01-28,
                  4: TAT-01-29, 5: TAT-9009,    6: TAT-9010,
                  7: TAT-512,   8: TAT-0109-H3, 9: TAT-902",
  note =	 "text & cassette (9はカセットのみ)"
}

TOEFLのリスニング, 村川久子
@Book{av-9,
  author = 	 "村川久子",
  title = 	 "TOEFLのリスニング",
  publisher = 	 "日本英語教育協会",
  volume =	 "A: CM-1, B: CM-2, C: CM-3, D: CM-4",
  note =         "book & cassette"
}