@inbook{weaver_1997, title={Determination of metals in ambient particulate matter using neutron activation analysis (NAA) gamma spectrometry}, volume={EPA/625R96010A}, booktitle={Compendium of methods for the determination of inorganic compounds in ambient air.}, publisher={Cincinnati, Ohio: U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Research Information, National Risk Management Research Laboratory}, author={Weaver, J. N.}, year={1997}, pages={505–554} }