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3. [Experimental study on harmonic detection of methane by use of a digital lock-in amplifier]. Dong L, MA WG, Yin WB, Li CY, Jia ST. Guang Pu Xue Yu Guang Pu Fen Xi; 2005 Mar; 25(3):473-6. PubMed ID: 16013337 [Abstract] [Full Text] [Related]
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