From

Measurement of Radon 222 Concentrations in the Basements of the New Engineering Building from the Pontificia Universidad Católica del Perú

Rojas Jhonny, Bertín Perez, Patrizia Pereyra, María Elena Lopez, Luis Vilcapoma

International Journal of Physics. 2016, 4(3), 55-58 doi:10.12691/ijp-4-3-2