PUJIINDIYATI, E. Ristin.
 The role of the 13C isotope of the Tree Ring in Recording of Carbon Cycle Change in Atmosphere.
<strong>Jurnal ILMU DASAR</strong>, [S.l.], v. 15, n. 1, p. 15-21, july 2014.
ISSN 2442-5613.
Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/JID/article/view/310" target="_new">https://jurnal.unej.ac.id/index.php/JID/article/view/310</a>&gt;. Date accessed: 23 apr. 2024.
doi: <a href="https://doi.org/10.19184/jid.v15i1.310">https://doi.org/10.19184/jid.v15i1.310</a>.