NEUTRON, GAMMA AND ROENTGEN FLUORESCENT ACTIVATION ANALYSIS OF HAIR OF CHILDREN SUFFERING FROM BRONCHIAL ASTHMA Article Alekseeva O.A., Belov A.G., Frontasyeva M.V., Gundorina S.F., Gustova M.V., Kusmenko L.G., Perelygin V.P., Zaverioukha O.S. Radiation Measurements. Vol. 34. 2001. P. 521-525