GUTIÉRREZ SÁNCHEZ, Sergio.
 Demographic Change in the State of México (1950-1990).
<strong>CIENCIA ergo-sum</strong>, [S.l.], v. 5, n. 1, p. 14-18, oct. 2017.
ISSN 2395-8782.
Available at: &lt;<a href="https://cienciaergosum.uaemex.mx/article/view/7977" target="_new">https://cienciaergosum.uaemex.mx/article/view/7977</a>&gt;. Date accessed: 19 aug. 2026.