Dual index information markedly similar sequence clustering analysis on IRfingerprint spectra of extracts of Guiful Dihuang and Jinkui Shenqi pills with ethanol Dual-index sequence analytical method for IR fingerprint spectra of the chloroform extract of Radix Glycyrrhizae Dual index grade sequence pattern recognition of extracts with ethanol of Mingmu Dihuang pills and Zhibai Dihuang pills Dual index information markedly similar sequence clustering analysis on IR fingerprint spectra of extracts of Guifu Dihuang and Jingui Shenqi pills with ethanol Standardization and digitization of fingerprint gas chromatograms of essential oil of Curcuma longa Comparative GC Analysis of Essential Oil in Imported Sandalwood