cursive writing is, apparently, no longer taught in American schools, sigh...
Fire Island Pines, 1979, by photographer Arthur Elgort, 2/30
as for the model, even I can't decipher the last name.
however, with a little digging, I'm sure someone else will figure it out.
here's a link
https://www.pineshistory.org/the-archives/fire-island-fashion-history-photographer-arthur-elgort-and-gia-the-first-super-model
the photo is on this page, but since it covers some bio info on Arthur Elgort and not just Gia, the photo could be of anyone
happy hunting