Hornfeld, H. (1975). A background study for business opportunities in plastics in the Middle East and North Africa. Business Communications Co.
Lua i Stíl Chicago (17ú heag.)Hornfeld, Howard. A Background Study for Business Opportunities in Plastics in the Middle East and North Africa. Geneva: Business Communications Co, 1975.
Lua MLA (9ú heag.)Hornfeld, Howard. A Background Study for Business Opportunities in Plastics in the Middle East and North Africa. Business Communications Co, 1975.
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