I now have pdfs of two copies of;
Zurek, P. M. 1990. “Binaural advantages and directional effects in
speech intelligibility,” in Acoustical Factors Affecting Hearing Aid
Performance, 2nd ed., edited by G. A. Studebaker and I. Hockberg Allyn
and Bacon, London, Chap. 15, pp. 255–276.
Thank you for your sound response,