MARQUEZ-BERBER, S. R.; TORCUATO-CALDERON, C.; ALMAGUER-VARGAS, G.; AYALA-GARAY, A. V.; AGUILAR-AVILA, J.; GARDEZI, A. K. THE ENVIRONMENT-FRIENDLY SMALL FARMERS AT THE CENTRAL HIGHLANDS OF MEXICO. European Scientific Journal, ESJ, v. 11, n. 10, 12 Nov. 2015.