@book{ Solr-244547, title = {Mercury, lead, arsenic, and cadmium in biological tissue : the need for adequate standard reference materials}, series = {Environmental monitoring series ; EPA-600/4-78-051}, author = {Beckert, Werner F.}, editor = {Environmental Monitoring and Support Laboratory (Las Vegas, Nev.). Monitoring Systems Research and Development Division}, editor = {United States. Environmental Protection Agency}, address = {Las Vegas, Nev. : Springfield, Va.}, publisher = {Environmental Protection Agency, Office of Research and Development, Environmental Monitoring and Support Laboratory ; for sale by the National Technical Information Service}, year = {1978}, pages = {60}, note = {Issued Aug. 1978.}, }