Hand gliding - Whose idea was it?

Where did the term "hand gliding" come from. Who started it? My first nomination is
May 18, 1973 - Dick Kleiner

May 18, 1973 - Dick Kleiner

Hang Gliding Association with both National and Local Forums
https://ushawks.org:443/forum/
JoeF wrote:The considerable amount of text in Low & Slow prior to the Lockwood article just may have shown some use of the "hand" item.
Maybe not hearing well on phones followed by writing articles moved some people to hear "hand" rather than "hang."