@BOOK{NAP21636, author = "National Research Council", title = "Guidelines for Developing Spacecraft Maximum Allowable Concentrations for Space Station Contaminants", doi = "10.17226/21636", url = "https://nap.nationalacademies.org/catalog/21636/guidelines-for-developing-spacecraft-maximum-allowable-concentrations-for-space-station-contaminants", year = 1992, publisher = "The National Academies Press", address = "Washington, DC" }