241
by Thewlis
Published 2000
242
by FRODESEN
Published 2000
243
by KELLY
Published 2000
244
by THOMSON
Published 1998
245
by Klein
Published 2006
246
by NIST
Published 1997
247
by TEO
Published 2002
248
by TEO
Published 2002
249
by TEH
Published 2001
250
Published 1992
251
Published 1995
252
by MASON
Published 1991
253
by FERREE
Published 1999
254
by NUMRICH
Published 2002
255
by Fuchs
Published 2001
256
by BOARDMAN
Published 2002
257
by Salomone
Published 2003
258
by Fuchs
Published 2001
259
by Mikulecky
Published 2004
260
by FITZPATRICK
Published 2005