This Link does not exist in your language, View in: English (en),
Or use Google Translate:  
Papia Portugues (mcm) | Change Language (Change Language)

http://www.fao.org/3/aq109e/aq109e00.pdf

The cost-benefit facts presented here are based on the results of the pilot implementation of snail farming as an income generation activity for 30 Liberian families in Nimba, Grand Gedee and River Gee Counties with the support of the Non-Legally binding instrument (NLBI) project during 2012-2013