Martin could be Kurt Martin.
He was earlier in Germany as Kurt Mandelbaum and was associated
with, rather he was part of, the Frankfurt School.
I think before WW II he moved to Manchester where he taught for
several years. He spent his last years in Holland. I remember a
lecture by Roy Harrod in which he said Kurt Martin (perhaps as
Kurt Mandelbaum) wrote the first book on Development Economics.
This book was written probably when Martin was teaching at
Manchester. I saw the book once but forget the title now. Martin was
a friend of Joan Robinson.
Anil Nauriya