Personal subscription rates apply only to individuals certifying that the journal is ordered for their personal use. A personal check must accompany such order. Library subscription rates apply to all institutions and organizations. A library order requesting shipment to individuals will be honored only if subscription at institutional rate is also received at such library. All prices include periodicals postage.
All prices are subject to change without notice.
Air-mail and back volume rates are quoted upon request. Change of address notifications should provide the subscriber's old and new address. Such changes will become effective within 20 days. Missing copies will be replaced only if valid claims are received within 60 days from date of mailing. Requests for refund are honored only prior to delivery of the first issue.