1657-03081657-0308S1657-0308201700010002410.14718/revarq.2017.19.1.1242Spain0006201700062017191243219682011196913328328435-43196420071978200619672012200220151980113-261984199451-6720102355-6919751996LIFE1946,21222229-5919801971Public Law 73-4791934Public Law 81-1711949Public Law 93-3831974Public Law 93-383193720092016201674198819962009198219812003201067-8219762008720001122299-326