Before revision: During the 1930s and 1940s , studies on Mandaeism were published by European scholars and writers such Hugo Odeberg (1930), Robert Stahl (1930), and Alfred Loisy (1934).
After revision: During the 1930s , studies on Mandaeism were published by European scholars and writers such Hugo Odeberg (1930), Robert Stahl (1930), and Alfred Loisy (1934).