The effect of the biopreparation product "Tamir" on cattle health and productivity M.R. Kudrin, A.L. Shklyaev, E.S. Klimova, G.V. Azimova and S.P. Bass BIO Web Conf., 36 (2021) 06027 Published online: 01 October 2021 DOI: 10.1051/bioconf/20213606027