%0 Journal Article %A Baird, Paul %T Harmonic morphisms and circle actions on 3- and 4-manifolds %J Annales de l'Institut Fourier %D 1990 %P 177-212 %V 40 %N 1 %I Institut Fourier %C Grenoble %U https://aif.centre-mersenne.org/articles/10.5802/aif.1210/ %R 10.5802/aif.1210 %G en %F AIF_1990__40_1_177_0