Mayhead, Robin
Cambridge University Press, 1974
Koleksi Publik
Boyd, Robin
F. W. Cheshire, , 1960
Buku Teks
Kuyper, Sjoerd, author
Leopold, 2000
Buku Teks
Cook, Robin
Putnam, 1987
Buku Teks
Faucett, L.W., author
Oxford University Press, 1951
Buku Teks