A global analysis of the Ordovician-Silurian boundary. [Bull. Brit. Mus. (Nat. Hist.), Geol. Ser., 43.] - Cocks, L.R.M., & Rickards, R.B. (editors), 1988.:

Following conditions of sale apply:
Terms of Sale

All books and papers are offered for sale subject to being unsold; book listings are updated regularly but at least once a week. Descriptions have been made carefully and all material is guaranteed to be in good second-hand or better condition if not stated otherwise; markings as found frequently in secondhand books (e.g. small stamps, former owner’s names, etc.) are mostly not mentioned if unobtrusive.
Any item found unsatisfactory can be returned for any reason within one week after receipt against full refund (minus shipping charges), later returns will be accepted only with our previous written permission.
Prices include VAT at the Dutch rate of 6% to customers within the European Union. Buyers registered for VAT exemption should include their VAT code with their order.
Orders by telephone should be confirmed in writing by mail, by fax or by e-mail.
Postage is extra to which is added a standard amount of € 1.00 per parcel towards cost of quality packing and handling.
Payment after receipt of our order confirmation by e-mail (or by proforma invoice if required) which will include full details about prices, additional charges and means of payment.
Payments are accepted by bank transfer (free within EU countries), bank cheque (incurring extra bank charges at € 15.00), Postal Giro, or PayPal. We have no facilities for processing directly credit card payments but we will welcome these through intermediary of PayPal.
Goods remain property of vendor until full payment has been received; if payment has not been received within three weeks after our confirmation has been sent, the order will be considered as cancelled.

Printed Catalogues are available regularly on certain comprehensive subjects and will be sent free of charge, please inquire.

Cocks, L.R.M., & Rickards, R.B. (editors), 1988.: - A global analysis of the Ordovician-Silurian boundary. [Bull. Brit. Mus. (Nat. Hist.), Geol. Ser., 43.]