?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=P%C3%A9rez+Miguel%2C+Enrique&rft.aulast=P%C3%A9rez+Miguel&rft.aufirst=Enrique&rft.date=2022&rft.title=The+Role+of+Social+Networks+on+Mental+Health.+An+empirical+study+of+population+over+50+years+old+in+Spain.&rft.degree=Master&rft.tpages=46