These order slips should have on them the author's surname, brief title, number of volumes, abbreviated note of place, publisher, year, publisher's price if known, name of dealer of whom ordered, date when ordered, and if its purchase has been requested by anyone that person's name and address.
For transmitting the order to the book dealer, a list on sheets should be made from the order slips, arranged either by publishers or alphabetically by authors.

This list may be written on one side of the paper only, with copying ink, and a letter-press copy taken; or, make a carbon copy of the sheet sent to the dealer.

The carbon copy has the advantage of being easier to handle and better to write on.

The books as received should be checked by this copy, or by the order cards.

The cards for books received should be put by themselves, alphabetically, and kept until the books they represent have been cataloged and the cards for them have been properly entered in the card catalog.