Possibly http://www.personal.psu.edu/t20/fom/postings/9903/msg00069.html http://www.personal.psu.edu/t20/fom/postings/9903/msg00069.h... (and Simpson's replies

Possibly http://www.personal.psu.edu/t20/fom/postings/9903/msg00069.html http://www.personal.psu.edu/t20/fom/postings/9903/msg00069.h... (and Simpson's replies downthread, e.g. http://www.personal.psu.edu/t20/fom/postings/9903/msg00151.html http://www.personal.psu.edu/t20/fom/postings/9903/msg00151.h...)