antedating of "off-off-Broadway" 1959

[Sam Clements]

M-W has 1965.  OED 1967.

So, did Dorothy Kilgallen invent/popularize the "off-off" term?

Using newspaperarchive---

3 March 1959 _Mansfield(OH) Newsjournal_ 15/6-7  (A syndicated column by Dorothy Kilgallen)

   <<If the prices for tickets to some of the off-Broadway shows continue going up, someone had better start an off-off-off-Broadway theatre. (Current example:  "On The Town" tickets are $5.85).

Sam Clements