@article{STNG_1978-1979__7__A7_0,
     author = {D. Walter, Colin},
     title = {The {Ambiguous} {Class} {Group} and the {Genus} {Group} of {Certain} {Non-Normal} {Extensions}},
     journal = {S\'eminaire de th\'eorie des nombres de Grenoble},
     note = {talk:7},
     pages = {1--26},
     publisher = {Institut des Math\'ematiques Pures - Universit\'e Scientifique et M\'edicale de Grenoble},
     volume = {7},
     year = {1978-1979},
     language = {en},
     url = {http://archive.numdam.org/item/STNG_1978-1979__7__A7_0/}
}