@book{CIF_1971-1972__5__1_0,
     author = {Gras, M. N. and Gras, G.},
     title = {Nombre de classes des corps quadratiques r\'eels $\mathbf {Q}(\sqrt{m}) , m < 10000$},
     series = {Cours de l'institut Fourier},
     publisher = {Institut des Math\'ematiques Pures - Universit\'e Scientifique et M\'edicale de Grenoble},
     number = {5},
     year = {1971-1972},
     language = {fr},
     url = {http://www.numdam.org/item/CIF_1971-1972__5__1_0}
}