The function of the green slips is not to determine which titles a library should order, but rather to speed up the process of selection by listing only those 3,000 or so titles published each year in legal and related fields. The basis of selection of titles listed on the green slips is a broad one, intended to provide law librarians with information on new titles in English that they might conceivably consider for purchase regardless of collection size or concentration. The savings that are effected in the cost of selection, by the use of the green slips, lie in the time saved by professional staff in searching through a pre-selected list. Further savings are realized in the cost of subscriptions to the possible sources. As a single example, the cost of subscribing to LC proof slips for all subjects is appreciably more than the cost of the entire Green Slip Service.
Shipments are cumulated and sent out weekly, with the invoice enclosed.
We can even pass along discounts on selected popular titles. Libraries may order titles either by sending in a library purchase order indicating our green sip, or even by using a copy of the green slip itself as an order form. The Green Slip Service offers a timely means of knowing what is being published in legal and related fields and provides prompt delivery of books, since we order books as we announce them. It offers savings in the subscription costs of a number of publications and services, and eliminates the need to check several sources for the same information. Our order service offers substantial savings in clerical work in that much of the typing of information for checking and ordering is eliminated.