@article{10_1017_S0008439500031313,
     author = {Okubo, Tanjiro},
     title = {Differentiable {Manifolds,} by {S.} {T.} {Hu.} x + 177 pages. {Holt,} {New} {York,} 1969. {U.S.} $12.65.},
     journal = {Canadian mathematical bulletin},
     pages = {155--156},
     year = {1972},
     volume = {15},
     number = {1},
     doi = {10.1017/S0008439500031313},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031313/}
}