Caribbean Journal of Mathematical and Computing Sciences The University of the West Indies, Cave Hill, Barbados.

Editor-in-chief: Charles C. Cadogan

Managing Editor: S. Mahdi

VOLUMES:	10 11 12 13 14
Editorial Board:	P. Chaudhuri, E.J. Farrell, L. Henry, S. Mahdi, C. Posthoff, H. Ramkissoon. (ASSOCIATE EDITORS)
	O.S. Bishop, D.D. Cowan, R.L. Graham, F. Harary, E.V. Krishnamurty, M. O'Neal, H. Niederreiter, C.R. Rao, R.C. Read, H. Reichgelt, R.L. Rubin, M.P. Schutzenberger, B. Sharma, I.J. Taneja, W.A. Veech. (MEMBERS)
Local Management Committee:	O.S. Bishop, C.C. Cadogan, S. Mahdi.
Published at the rate of one volume per year by the University of the West Indies. Copyright @ 1991. All rights reserved. No part of this publication may be reproduced by any means, transmitted or translated into a machine language without the written permission of the publisher.
Subscription Price:	U.S.$40.00, or its equivalent, per volume. (Including charges for Air Mail Delivery).
Claims for undelivered copies must be made no later than three months following the month of publication. Missing copies will be supplied when losses have been sustained in transit and where reserve stock will permit.
Orders to be sent to:	Managing Editor, Caribbean Journal of Mathematical and Computing Sciences, P.O. Box 64, Bridgetown, BARBADOS. E-mail address: cjmcs@uwichill.edu.bb
Announcements, notices, advertisement to featured.
Full page (11 cm. X 19 cm.) $200.00 U.S. Half page (11 cm. X 9 cm.) $ 100.00 U.S. Per single length centimeter $12.00 U.S. Caribbean Institutions, half-price.