Juanita Guccione Parents In Trying To Preserve An Artist's Legacy,where Do I Start?

In trying to preserve an artist's legacy,where do I start? - juanita guccione parents

My friend has a huge collection of works.She his mother was known in the 40s and 50s. He wants to be able to a person or organization that can assist in maintaining this work contact. I'm not an artist, and really do not know where to start. The painter was Juanita Guccione femin an enthusiastic and there were 3 types of painting.
Thank you!