Study of the cattle marketing system at the Veracruz livestock Fair of the province of Pastaza. PREPRINT UEA AGROPECUARIA, 2026. DOI: 10.59410/PREPRINT-UEA-vAGP2324ep09-173. Disponível em: https://preprints.uea.edu.ec/index.php/agr/preprint/view/173. Acesso em: 8 nov. 2026.