April 20th, 1915
Joseph Wolpe, South African-born psychotherapist (died in 1997) born on April 20, 1915. Read about how to open files in Open File Database.
Events around April 20, 1915
| April 22nd, 1915 | Event | The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres. |
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