Cataloging of audiovisual materials and other special materials a manual based on AACR2 and MARC 21

The only useful chapter for me was 10, p. 265-281, Three-Dimensional Artefacts and Realia. It was essentially a restating of the AACR2 rules, but in a different verbiage and more detail, although that wasn't necessary. It's very helpful from a MARC cataloging standpoint and I will be saving my notes for future reference, when I do MARC cataloging of carrots and hiccups and such. Here is one paragraph that demystifies an AACR2 phrase I wondered about:

"Artefacts not intended primarily for communication." This phrase is used in 10.4C2 through 10.4F2. The intent of the phrase is unclear. For example, a Civil War-era cannonball is an artifact, and definitely communicates something about the horrors of war. Ben Tucker explains: "I remember rather clearly the discussion that went into the formulation of the rule. The words 'not intended for communication' mean nothing more than 'not published,' or 'not issued in an edition.' Another term that might have serves is 'not commercially available in multiple copies.' (Ben R. Tucker, LC, letter to Nancy Olson, Dec.17, 1984)