Bill Marx, son of Harpo Marx:... - Cinema Shorthand Society | Facebook
Harp Sheet Music | Marx, Harpo with Rowland Barber, Harpo Speaks | HarpConnection.com
Harpo Speaks! (Paperback) | Tattered Cover Book Store
Harpo speaks-- about New York; by Harpo Marx with Rowland Barber ; with an introduction by E.L. Doctorow by Rowland Harpo ; Barber - First printing (stated) - 2001 - from Calvello Books (SKU: 92825)