References for Appendix A
The HTML 4.0 Sourcebook

HTML Entity Reference Test Document

http://www.iangraham.org/books/html4ed/appa/appa.html

Specification for HTML Internationalization

http://www.ietf.org/rfc/rfc2070.txt

General Character Set Information Relevant to the Web

http://www.w3.org/hypertext/WWW/International/Overview
http://www.w3.org/hypertext/WWW/MarkUp/html-spec/charset-harmful.html

Character Set Specifications

http://babel.alis.com:8080/codage/index.html   (Encoding Issues)
http://babel.alis.com:8080/codage/iso8859/jeuxiso.en.htm   (ISO 8859-* character sets)
http://www2.echo.lu/oii/en/chars.html   (Character set standards)
ftp://www.ietf.org/rfc/rfc1345.txt   (Mnemonics for characters)
http://www.ifcss.org/ftp-pub/software/info/cjk-codes/   (Chinese/Japanese/Korean character sets -- CJK)

ISO 10646 /UNICODE Character Sets - General Information

http://www.ifcss.org/ftp-pub/software/info/cjk-codes/Unicode.html   (ISO 10646 and Unicode)
http://www.unicode.org   (Complete online Unicode specification)

Defined Internet Names for Character Sets

ftp://ftp.isi.edu/in-notes/iana/assignments/character-sets

SGML Declarations and Character Sets

http://www.sil.org/sgml/wlw11.html

http://www.sgmlopen.org/sgml/docs/ercs/ercs-home.html

Books

Understanding Japanese Information Processing, by Ken Lunde, O'Reilly & Associates, Inc. (1993). Provides a good overview of character encoding issues, with particular emphasis on the problems of Japanese text.

The Unicode Standard, Worldwide Character Encoding, Version 2.0 (1996). Complete description of the Unicode character set, with a CD-ROM illustrating all the defined characters. Not exactly fireside reading, but very useful for practical work.