- Author: B. L. Ullman
- Language: Italian
- Year: 1960
- Author: B. L. Ullman
- Language: English
- Year: 1963
- Author: B. L. Ullman
- Language: English
- Year: 1963
- Author: Richard H. Ullman
- Language: English
- Year: 1961
- Author: Richard H. Ullman
- Language: English
- Year: 1961
- Author: Richard H. Ullman
- Language: English
- Year: 1961
- Author: Jure Leskovec Anand Rajaraman Jeffrey David Ullman
- Language: English
- Year: 2020
- Author: Sharon R. Ullman
- Language: English
- Year: 2023
- Author: Richard Ullman
- Language: English
- Year: 2019