. 2012 May 6;6:38. doi: 10.1186/1752-153X-6-38
Copyright ©2012 Windsor and Brooks; licensee Chemistry Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 4.
Seasonal variation of percentage oil yield.