Guinness world records 2001

Cyhoeddwyd 2000

How to run a successful conference proven management techniques for delivering a successful event on budget

gan Fisher, John G.
Cyhoeddwyd 1998

The new Webster's international encyclopedia the new illustrated reference guide

Cyhoeddwyd 1998

The world almanac and book of facts, 1996

Cyhoeddwyd 1995

Webster's new encyclopedic dictionary.

Cyhoeddwyd 1992

The world almanac and book of facts 1989

Cyhoeddwyd 1988

The Hammond almanac of a million facts, records and forecasts 1979

Cyhoeddwyd 1979

Britannica book of the year

Cyhoeddwyd 1976