Oil and by-products

. Amoco –Argentina–

. ANCAP –Uruguay–

. CEPSA –España–

. General Electric Plastics –España–

. Hidisa-Hinisa –Argentina–

. Panamerican Energy – Amoco/Bridas –Argentina–

. Pemex –México–

. Petrox ­–Chile–

. Profertil –Argentina–

. Repsol – YPF –Argentina–

. Repsol Petróleo –España–

. Transtexas Gas –Estados Unidos–