Photometric Variability of 27 Cygni Percy, J. R. ; Richer, M. G. ; Bozic, H. ; Harmanec, P. ; Horn, J. ; Koubsky, P. ; Kriz, S. ; Kelsey, L. A. ; Hoff, D. B. ; Landis, H. J. ; Reisenweber, R. C. ; Wasson, R. Abstract Publication: Information Bulletin on Variable Stars Pub Date: May 1986 Bibcode: 1986IBVS.2891....1P