== Copyright expired on most of her works? == 

 According to this page, works created  before January 1, 1978 but not published before December 31, 2002 are now in public domain. This video by WTTW shows that most of the photographs were taken around the 60's in Chicago, which would certainly place them before 1978. 

 I propose that the works are marked as being in Public Domain, especially her auto-portraits which allow to clearly assess the date of creation.