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Whittaker, E.A.; Sullivan, B.J.; Bjorklund, G.C.; Wendt, H.R.; Hunziker, H.E., ND4 Schuler band absorption observed by laser FM spectroscopy in a photochemical reaction, J. Chem. Phys., 1984, 80, 2, 961, https://doi.org/10.1063/1.446757 . [all data]