PDF & Book ISBNs for same text-530, 538, 856

PDF ISBN goes on the [electonic resource] record and not on the monograph record.
Include the note:-
530 # # $a Issued also in print form.

The book ISBN goes on the book record and not on the PDF record [electronic resource].
Include the note:-
530 # # $a Also available in online at the publisher's home page. Address as of 22.10.2008: http://www/........
538 # # Item does not list system requirements.
856 4 1 $Publisher's home page$uhttp://www....

facsim. in 300 field

facsim. (from AACRII glossary) - A reproduction simulating the physical appearance of the original in addition to reproducing its contents exactly.

Simulating. (from Macquarie dictioanry) To have the appearance of.

The question arises if a facsim. has to be the same size. The answer is no, but it must have the same appearance.

Cutter

http://www.uiowa.edu/~libsci/faculty/cotton/122-cutter.htm

Some interesting notes here on Cutters eg.

The Cutter number "D557" comes between D55 and D56. ie D55 = D550 but the 0 is dropped.

The "3 figure tables" do not use D55, but goes from D549 to D551.