Geodesic
Three-dimensional manifolds with hyperplane sections which are ruled surfaces
Matematičeskie zametki, Tome 14 (1973) no. 6, pp. 821-826.

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A nonsingular 3-dimensional algebraic manifold over the field of complex numbers, whose general hyperplane section is a ruled surface with irregularity $q>0$, is birationally equivalent to the direct product of the projective plane and a nonsingular curve of genus $q$. 
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     author = {B. V. Martynov},
     title = {Three-dimensional manifolds with hyperplane sections which are ruled surfaces},
     journal = {Matemati\v{c}eskie zametki},
     pages = {821--826},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_14_6_a5/}
}
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B. V. Martynov. Three-dimensional manifolds with hyperplane sections which are ruled surfaces. Matematičeskie zametki, Tome 14 (1973) no. 6, pp. 821-826. http://geodesic.mathdoc.fr/item/MZM_1973_14_6_a5/