Pastorale populationer afhang af, hvilken af følgende for deres overlevelse?
Maasai people
Husdyr som føde for hyrdebrugere i Afrika. Arkiveret 2009-03-11 på Wayback Machine. J. M. Suttie. citat fra Nestel, P. 1989. A society in transition: developmental and seasonal influences on the nutrition of Maasai women and children ILCA, Nairobi
Maasai people
Livestock as food for pastoralists in Africa. Archived 2009-03-11 at the Wayback Machine. J. M. Suttie. quoting from Nestel, P. 1989. A society in transition: developmental and seasonal influences on the nutrition of Maasai women and children ILCA, Nairobi
Maasai people