IGWE, K. C., ONYENWEAKU, C. E., TANKO, L., Dr..
 A Linear Programming Approach to Combination of Crop, Monogastric Farm Animal and Fish Enterprises in Ohafia Agricultural Zone, Abia State, Nigeria.
<strong>Global Journal of Science Frontier Research</strong>, [S.l.], mar. 2013.
ISSN 2249-4626.
Available at: &lt;<a href="https://journalofscience.org/index.php/GJSFR/article/view/759" target="_new">https://journalofscience.org/index.php/GJSFR/article/view/759</a>&gt;. Date accessed: 24 may 2022.