Andy Warhol Factory Photograph with Warhol Foundation Archive Embossed Stamp

This is a 3.5" X 4.5" photograph taken most likely at the Andy Warhol Factory or gallery opening, featuring 2 woman and man in background. The back is inscribed with "Elena" in blue ballpoint which might be identifying one of the woman, the other woman could possibly be Patti Hanson or Nico. Other unidentified man in background. It is embossed with the Warhol Foundation stamp, indicating its authenticity and most probably came from the 1988 sotheby's auction of 10000+ items from the Andy Warhol Factory archives.