| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Cooperation in the Multi-Ethnic Classroom: The Impact of Cooperative Group Work on Social Relationships in Middle Schools | 978-1-85346-284-9 (1-85346-284-5) | 1994 | Helen Cowie · Michael Boulton |
R. L · René Lapierre · Rene Laufer · Renee Labor · Ron Lavery · Ron Leifer · Ron Lieber · Roni Lebauer