TY - RPRT TI - Difference-frequency-based tunable absorption spectrometer for detection of atmospheric formaldehyde. AU - D G Lancaster AU - A Fried AU - B Wert AU - B Henry AU - F K Tittel PY - 2000 DO - 10.1364/ao.39.004436 UR - https://pubmed.ncbi.nlm.nih.gov/11543547/ ID - 11543547 ER -