Despite the opposition to protectionist interests, the Portuguese government succeeded in bringing about some liberalization of the industrial licensing system, as well as in reducing trade barriers to conform with EFTA and GATT agreements. The last years of the Salazar era witnessed the creation of important privately organized ventures, including an integrated iron and steel mill, a modern ship repair and shipbuilding complex, vehicle assembly plants, oil refineries, petrochemical plants, pulp and paper mills, and electronic plants. As economist Valentim Xavier Pintado observed, "Behind the facade of an aged Salazar, Portugal knew deep and lasting changes during the 1960s."