Elizabeth Catlett "Skipping Rope" Print

This came from a relative's estate. I've done some research on Elizabeth Catlett and I think this is a lithograph/print. It is signed in pencil in the lower right corner, and the title "Skipping Rope" is penciled in the lower left corner, but no series number where you would expect to find one. I believe this is the same Elizabeth Catlett, Sculptor, who has some of her work at various museums, including the Smithsonian in Washington DC. I have searched for several years, on and off, for additional information on this particular piece. Thanks for ANY leads!