found: Work cat.: 2018370164: Mamani Oño, C.I. Niveles de relacionamiento y balance estructural de la red de innovación de hule (Hevea brasilensis Muell. Arg.) en Tezonapa, Veracruz, 2013:t.p. ([cataloger's translation] Levels of relationship and structural balance in the innovation network of rubber (Hevea brasiliensis Muell. Arg.) in Tezonapa, Veracruz) p. 47 (in English: rubber producers) p. 51 (in English: growers)
found: New York times WWW site, viewed May 7, 2018(in article dated Aug. 29, 2013: rubber farmers)
found: International journal of agricultural sustainability, 2017, via WWW, viewed May 7, 2018(rubber farmers)
found: Journal of geography, Nov. 1933, via WWW, viewed May 7, 2018:p. 323 (rubber growers)
found: Nikkei Asian review WWW site, viewed May 7, 2018(in article dated March 10, 2016: rubber growers; natural-rubber growers)
