Claim: Virginia Henderson was co-author of the fifth (1955) and sixth (1978) editions and she developed one of the major nursing theories.
Evidence: Virginia Avenel Henderson (November 30, 1897 – March 19, 1996) was an influential nurse, researcher, theorist, and author. She was co-author of the fifth (1955) and sixth (1978) editions. She was the author of the 1939 (4th ed.) revision of Bertha Harmer's Textbook of Principles and Practices of Nursing when the original author died.