I found “this Sept 1991 document”:http://www.fas.org/news/iraq/1991/910917-197305.htm while looking for something else. It’s an unclassified summary of a White House report to Congress “on the international export to Iraq of nuclear, biological, chemical and ballistic missile technology.”
It states that
bq. throughout the 1980’s many countries, especially in Western Europe, “were key suppliers of chemical equipment, chemical precursors, and technical expertise for Iraq’s chemical weapons program.” Similarly, Iraq’s “nuclear, missile and biological weapons program also benefited from foreign sources, mainly in Europe.”
More interesting, to me, is the summary’s function as a pretty good, if U.S.-centric, history of multilateral efforts to control WMD-related exports. Take a look.