ACQUISITION OF WOOD WOOD CARPENTRY AND FORMWORK FOR THE WORK CREATION AND IMPLEMENTATION OF THE CENTRAL LIBRARY OF THE NATIONAL INTERCULTURAL UNIVERSITY OF THE AMAZON DISTRICT OF YARINACOCHA PROVINCE OF COLONEL PORTILLO DEPARTMENT OF UCAYALI II STAGE FOURTH CERTIFICATION BALANCE OF WORK. - ACQUISITION OF WOOD WOOD CARPENTRY AND FORMWORK FOR THE WORK CREATION AND IMPLEMENTATION OF THE CENTRAL LIBRARY OF THE NATIONAL INTERCULTURAL UNIVERSITY OF THE AMAZON DISTRICT OF YARINACOCHA PROVINCE OF COLONEL PORTILLO DEPARTMENT OF UCAYALI II STAGE FOUR CERTIFICATION BALANCE OF WORK (EXPIRED)