This is NOT the edition that I have.
My edition is paperbound, published by COMPANIA EDITORIAL CONTINENTAL, S. A., Calzada de Tlalpan, Mexico, D.F. Primera edicion, julio de 1956, Treceava impesion, marzo de 1969.
This book is signed by the author and given to me by his grandson, Sergio Vega.
"Por mi raza hablara el Espiritu."