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المؤلف :Heard, David,
تاريخ النشر : 2011
الموضوع : Petroleum industry and trade
المؤلف :Michalko, Michael,
الموضوع : Creative thinking.,Creative ability.,Imagination.
المؤلف :Fitzgerald, Ella,, Wankeri, Andreas,, Schramm, Carl,
الموضوع : Technological innovations.,Research and development projects.