Through thick and thin: Structure of the Galactic thick disc from extragalactic surveys G. Kordopatis, V. Hill, M. Irwin, G. Gilmore, R. F. G. Wyse, E. Tolstoy, P. de Laverny, A. Recio-Blanco, G. Battaglia and E. Starkenburg A&A, 555 (2013) A12 Published online: 19 June 2013 DOI: 10.1051/0004-6361/201321470