<?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://general-terms.thesaurus.ekt.gr/vocab">573.3</topic></authority><related type="narrower"><topic>573.3/5</topic></related><related type="narrower"><topic>573.3/5379</topic></related><related type="narrower"><topic>573.3/59</topic></related><related type="narrower"><topic>573.3/6</topic></related><related type="narrower"><topic>573.3/8</topic></related><related type="narrower"><topic>573.3/8</topic></related><related type="narrower"><topic>573.37</topic></related><related type="narrower"><topic>573.377</topic></related><related type="narrower"><topic>591.4</topic></related><related type="other"><topic>573.9/97</topic></related><related type="other"><topic>616.3</topic></related><related type="other"><topic>573.3</topic></related></mads>