Pengarang: Beltran Alain Beltran

Beltran Alain Beltran & Bussiere Eric Bussiere: L’Europe et la question energetique

Beltran Alain Beltran & Bussiere Eric Bussiere: L’Europe et la question energetique

Alain Beltran: A Comparative History of National Oil Companies

Beltran Alain Beltran: Les routes du petrole / Oil Routes

Beltran Alain Beltran: Les routes du petrole / Oil Routes

Beltran Alain Beltran & Laborie Leonard Laborie: Electric Worlds / Mondes electriques

Beltran Alain Beltran & Laborie Leonard Laborie: Electric Worlds / Mondes electriques