Eija Koivusalmi, Elisa Haatainen and Andrew Root, ‘Quantitative RPHPLC Determination of Some Aldehydes and Hydroxyaldehydes as Their 2,4-Dinitrophenylhydrazone Derivatives’, Analytical Chemistry 71 (1999) 86-91. 各位在企业单位的怎么查外文资料的?以前我都是托在高校的熟人查,现在人家联系不到了,谁帮我查一下,谢谢了