261
by Clutterbuck, Richard
Published 1994
262
by Ruland, Jurgen, 1953-
Published 2005
263
by Cuthbertson, Ian M, 1957-
Published 1988
264
Published 1996
265
Published 1993
266
by Jolliffe, Jill
Published 1978
267
by Asher, Herbert B.
Published 1980
268
by Girgis, Maurice
Published 1984
269
Published 2010
270
Published 1997
271
Published 1985
272
by Lawrance, Alan.
Published 1975
273
by Weisskopf, Kurt
Published 1980
274
Published 1994
275
by Dore, Isaak I, 1950-
Published 1985
276
Published 1996
277
278
Published 1980
279
by Chandler, David P, 1933-
Published 1993
280
Published 1996