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C. Means of obtaining information on trade between related parties (IMTS 2010 Compilation Guide)
E. Examples of enterprise surveys conducted to obtain additional information (IMTS 2010 Compilation Guide)
D. Examples of enterprise surveys conducted to collect missing trade data (IMTS 2010 Compilation Guide)
B. Main types of non-customs data sources and their uses (IMTS 2010 Compilation Guide)