@article{e171b0b515fb436a885c75ea7c279dcc,
title = "The amplification of celestial maser radiation in the general many-level case",
keywords = "INTERSTELLAR MASERS, LATE STARS, MASER OUTPUTS, STAR FORMATION, WATER MASERS, COHERENT LIGHT, ENERGY LEVELS, LINE SPECTRA, MAXWELL-BOLTZMANN DENSITY FUNCTION, STEADY STATE",
author = "Malcolm Gray and D {Field} and {Gray}, {M D}",
year = "1988",
month = sep,
language = "English",
volume = "234",
pages = "353--372",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "1365-2966",
publisher = "Oxford University Press",
}