00461nam a2200097Ia 4500 180130s9999 xx 000 0 und d Yuan, Yazhou; Chen, Cailian; Guan, Xinping; Yang, Qiuling An energy-efficient underground localization system based on heterogenous wireless networks 2016 Book title: Wireless sensor networks : from theory to applications--Acession number C20745; pages 154-172 WIRELESS SENSOR NETWORKS 354001 354001 0 0 0 CL CL 2018-01-30 0 2018-01-30 00:00:00 2018-01-30 BC