TY - GEN TI - OECD Studies on environmental innovation : environmental policy, technological innovation and patents SN - 978-92-64-04681-8 U1 - OCDE 333.72 O287o 2008 PY - 2008/// CY - París [Francia] : PB - Organisation for Economic Co-operation and Development, KW - PROTECCIÓN DEL MEDIO AMBIENTE KW - POLÍTICA AMBIENTAL ER -