G. Zech

• Astronomy and Astrophysics Abstracts
• Astronomy and Astrophysics Abstracts
• Author and Subject Indexes to Volumes 1–10 Literature 1969–1973
• Literature 1974, Part 2
• Literature 1981, Part 2
• Literature 1983, Part 1
• Literature 1984, Part 1
• Literature 1984, Part 2
• Literature 1985, Part 2
• Literature 1986, Part 1
• Literature 1987
• Literature 1987, Part 1