TY JOUR TI LICHENS AS INDICATORS OF POLLUTION WITH HEAVY METALS KW Lecanora albescens (Hoffm.) Branthet Rostr KW Physcia adscendens (Fr.) H. Olivier KW Physcia aipolia (Ehrh. ex Humb.) Fürnr KW heavy metals KW bioindication JO Vestnik of Astrakhan State Technical University AU Popova, E.. PY 2018 IS 2018 PB Astrakhan State Technical University