Here is a link to a PDF.
http://etheses.bham.ac.uk/2869/7/French_11_PhD.pdf
EARLY ONENESS PENTECOSTALISM,
GARFIELD THOMAS HAYWOOD, AND THE INTERRACIAL
PENTECOSTAL ASSEMBLIES OF THE WORLD (1906-1931)
by Talmadge Leon French
A Thesis submitted to
The University of Birmingham
for the Degree of Doctor of Philosophy