Surface magnetic fields and stellar wind variability in O-type stars Henrichs, H. F. ; Kaper, L. ; Nichols, J. S. ; Bohlender, D. ; Cao, H. ; Gordon, K. ; Hill, G. ; Jiang, Y. ; Kolka, I. ; Neff, J. E. ; Telting, J. H. Abstract Publication: IAU Symposium Pub Date: 1995 Bibcode: 1995IAUS..176P.229H