William Henry Leffingwell
Author
William Henry Leffingwell was an American organizational theorist, president of W. H. Leffingwell, Inc., New Jersey, management author, and the founder of National Office Management Association.
Leffingwell was born in Oxford County, Ontario to... Wikipedia
Born: July 14, 1876, Oxford, United Kingdom
Died: December 19, 1934 (age 58 years), Westfield, NJ