John Heliker sketchbooks (HC.MC.881), Quaker & Special Collections, Haverford College, Haverford, PA.
John Heliker sketchbooks (HC.MC.881), Quaker & Special Collections, Haverford College, Haverford, PA. https://archives.tricolib.brynmawr.edu//repositories/5/resources/682 Accessed October 30, 2024.
