الفترة:
Subjects: Foreign exchange; Exchange rates; Petroleum products; Prices
Subjects: Libya; Statistics; Petroleum products; Prices
Subjects: Libya; Statistics; Petroleum products
Subjects: Libya; Statistics; Corporations; Petroleum; Petroleum products
Subjects: Corporations; Industrial applications; Petroleum; Petroleum products
Subjects: Analytical chemistry; Industrial chemistry; Petroleum products; Technology
Subjects: Egypt; Statistics; Economic aspects; Natural gas; Petroleum products
Subjects: Egypt; Statistics; Natural gas; Petroleum products
Subjects: Algeria; Petroleum products; Competition; Economic aspects
Subjects: Petroleum products; Transport
Subjects: Kuwait; Statistics; Petroleum products
Subjects: Corporations; Petroleum; Petroleum products
Subjects: Economic aspects; Petroleum products; Prices
Subjects: Kuwait; Petroleum products; Transport
Subjects: Neural networks (Computer science); Oil wells; Petroleum products