<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_es">[hormigón por composición u origen]</topic></authority><related type="narrower"><topic>hormigón asfáltico</topic></related><related type="narrower"><topic>hormigón de cemento</topic></related><related type="narrower"><topic>hormigón de cenizas</topic></related><related type="narrower"><topic>hormigón coloidal</topic></related><related type="narrower"><topic>hormigón ciclópeo</topic></related><related type="narrower"><topic>hormigón de cal</topic></related><related type="narrower"><topic>hormigón impregnado de polímeros</topic></related><related type="narrower"><topic>hormigón de mampuestos</topic></related><related type="narrower"><topic>hormigón de escorias</topic></related><related type="narrower"><topic>poured concrete (traducció pendent)</topic></related><related type="broader"><topic>hormigón</topic></related></mads>