div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documenteca-unam-title-ecacdr-author-unam-created-date-10212019-121243-pmhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: eca - UNAM · Title: ecacdr Author: unam Created Date: 10212019 12:12:43 PM loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220421165e944060a3abfb5cdc570808html5thumbnails1jpg width=140 height=200 divdiv