图书馆研究 ›› 2009, Vol. 39 ›› Issue (4): 12-13.
杜亮 吴芳 曾强
DU Liang,WU Fang,ZENG Qiang (1.Shenyang Institute of Aeronautical Engineering,Shenyang 1 lO136,China;2.Shenyang University of Technology, Shenyang 110168,China;3.Bohai Shipbuilding Vocational College,Huludao 125000,China)