By Khayyám, Omar, Watts M.A. Ph.D., Professor Cedric, Carabine, Dr Keith, Fitzgerald, Edward
By Khayyám, Omar, Briggs, Professor A. D. P, Fitzgerald, Edward
By Khayyám, Omar, Fitzgerald, Edward
By Khayyám, Omar
By Khayyám, Omar, Heath-Stubbs, John, Avery, Peter