A 1.3 cm line survey toward IRC +10216 Y. Gong, C. Henkel, S. Spezzano, S. Thorwirth, K. M. Menten, F. Wyrowski, R. Q. Mao and B. Klein A&A, 574 (2015) A56 Published online: 23 January 2015 DOI: 10.1051/0004-6361/201424819