A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz Xiao-Yan Zhang, Qing-Feng Zhu, Juan Li, Xi Chen, Jun-Zhi Wang and Jiang-Shui Zhang A&A, 606 (2017) A74 Published online: 13 October 2017 DOI: 10.1051/0004-6361/201730791