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Over 750 full color photographs and descriptions of oil cans from companies such as Esso, Gulf Oil, Quaker State and Shell as well as Canadian and regional companies including Kentucky Consumers, Lion Head and Pittsburgh Penn Oil. The oil cans are arranged alphabetically by company for ease of identification. Helpful information includes methods of grading the condition of a can, collectors' resources, and oil can manufacturers. This valuable resource, featuring descriptions and estimated values of every item, is a must for the serious gas station collector.
Over 750 color photographs of oil cans span 120 years, and over 90 brands. The cans are presented alphabetically by company, and a detailed description and estimated value are included for each one. Helpful information for collectors includes methods different oil companies used to date their cans, how to grade the condition of a can, collector resources, and a list of can manufacturers.
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As well as formulating a framework of fuzzy types to represent both partial truth and uncertainty in conceptual graphs, this volume develops the foundations of order-sorted fuzzy set logic programming and details recent applications of fuzzy conceptual graphs.