Material supplied by WPS agency may be used for internal review, analysis or research only. Any editing, reproduction, publication, rebroadcasting, public showing or public display is forbidden and may violate copyright law.

Payment can be made upon an invoice by money remittance, check deposit or cash.

Prices quoted above do not include shipment costs. Email transmission of materials is free of charge. Additional charges for delivery by fax or post are available on request.

Digest prices are applicable to individual subscribers and educational institutions. Corporate subscribers and information services - negotiated prices only.