To build on Mary Jane's point, I think that the examples are useful but that there are also some serious omissions in that section of the NACO manual.   There's no mention of $u at all and there isn't even one example showing a URL being used in a 670.  In fact, the formula given there for including URLs is contributing to the problem because it shows the URL embedded in $a with other information:

Internet, URL: [URL address],[date of search] $b ([information])
Since we're all supposed to be following the NACO manual, it's not surprising to me that we are not finding uniform practice.  If there were an example to guide usage, I think we would all gratefully follow it.

Celine Noel
UNC-Chapel Hill

Mary Jane Cuneo wrote:
[log in to unmask]" type="cite">Wayne, I do the same thing.  I think of it as the equivalent of citing "t.p." or "p. [whatever]" in 670 when the source is a book.  There is an example in the NACO Participants' Manual. (Section I: New Authority Records/ 670 Field / XV.Citing Internet Resources, third example:  |b contact us page -- an especially nice example for the informal internet-flavored language, which is indeed what we usually end up citing.)

Mary Jane Cuneo
Serials cataloging and NACO
Fine Arts Library
Harvard University

Wayne Richter wrote:

<snip> In citing these in 670s I usually use "history
page" or "history pages" following the name of the web site, and
followed by the date viewed. I rarely find the information I need on the
home page so I wonder if this is common and recommended practice (i.e.
citing particular areas of a web site)?
Thank you.

Wayne Richter
Asian Materials Specialist/PCC Liaison
The Libraries
Western Washington University
Bellingham, WA 98225-9103