6.7 GHz methanol maser survey toward GLIMPSE point sources and BGPS 1.1 mm dust clumps Yan Sun, Ye Xu, Xi Chen, Bo Zhang, Yuan-Wei Wu, Christian Henkel, Andreas Brunthaler, Yoon Kyung Choi and Xing-Wu Zheng A&A, 563 (2014) A130 Published online: 21 March 2014 DOI: 10.1051/0004-6361/201323047