Description based on 1985-1987 ed.; title from cover.
Supplement
Kept up to date between editions by supplements entitled: Update.
Form
Related paper version of an integrating resource available via the Internet at the IACB web site. Address as of 12/21/07: http://www.doi.gov/iacb/order/source%5Finfo.html; current access is available via PURL.