Knowledge and practice on preventive measures against Covid 19 in merchants selling basic necessities of the Huancavelica food market - 2021. gnosiswisdom [Internet]. 2023 Apr. 25 [cited 2026 Apr. 17];3(1):35-48. Available from: https://gnosiswisdom.pe/rev_gnosis/index.php/revista/article/view/55