id	domain	url
afs-6957	redalyc.uaemex.mx	http://redalyc.uaemex.mx/src/inicio/artpdfred.jsp?icve=269121628002
afs-6957	www.fao.org	http://www.fao.org/docrep/003/w3647e/w3647e00.htm#toc
afs-6957	www.lrrd.org	http://www.lrrd.org/lrrd22/6/sarr22110.htm
afs-6957	www.lrrd.org	http://www.lrrd.org/lrrd3/2/cipav1.htm