A Preliminary Study of Coronal Structures by Means of Time-Lapse Photography Sheeley, N. R. ; Bohlin, J. D. ; Brueckner, G. E. ; Purcell, J. D. ; Scherrer, V. ; Tousey, R. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1974 Bibcode: 1974BAAS....6Q.294S