Commodity market in Sumer between 4500 BC and 4000 BC. Sumerians first used clay tokens sealed in a clay vessel, then clay writing tablets to represent the amount—for example, the number of goats, to be delivered. These promises of time and date of delivery resemble futures contract. Early civilizations variously used pigs, rare seashells, or other items as commodity money. Since that time traders have sought ways to simplify and standardize trade contracts. Gold and silver markets evolved in classical civilizations. At first the precious metals were valued for their beauty and intrinsic worth and were associated with royalty. In time, they
The Aurum Film Encyclopedia The Aurum Film Encyclopedia The Aurum Film Encyclopedia is a multi-volume reference work on cinema, published in the UK by Aurum Press and edited by Phil Hardy. The first volume, devoted to western films, appeared in 1983, with eight subsequent volumes announced at that time as "forthcoming". However, only three additional entries were issued. All four volumes have been published in the U.S. by The Overlook Press, with the same contents as the UK editions but with the title changed to The Overlook Film Encyclopedia. The Foreword to all four volumes is the same, describing the proposed nine-volume encyclopedia as