我国无线寻呼市场研究

赵黎明;刘激扬

The Research and Forecasting on the Market of Radio Paging in China

Zhao Liming;Liu Jiyang

系统工程理论与实践 . 1997, (9): 132 -138 . DOI: 10.12011/1000-6788(1997)9-132