U. Esser

• Astronomy and Astrophysics Abstracts
• Astronomy and Astrophysics Abstracts
• Author and Subject Indexes to Volumes 1–10 Literature 1969–1973
• Literature 1974, Part 2
• Literature 1978, Part 1
• Literature 1985, Part 2
• Literature 1986, Part 1
• Literature 1987
• Literature 1987, Part 1
• Literature 1987, Part 2
• Literature 1988, Part 1
• Literature 1976, Part 1