The distribution of sequences in arithmetic progressions
Séminaire Delange-Pisot-Poitou. Théorie des nombres, Volume 13 (1971-1972) no. 2, Talk no. 25, 5 p. 
@article{SDPP_1971-1972__13_2_A10_0,
     author = {Halberstam, Heini},
     title = {The distribution of sequences in arithmetic progressions},
     journal = {S\'eminaire Delange-Pisot-Poitou. Th\'eorie des nombres},
     publisher = {Secr\'etariat math\'ematique},
     volume = {13},
     number = {2},
     year = {1971-1972},
     note = {talk:25},
     zbl = {0323.10037},
     mrnumber = {392869},
     language = {en},
     url = {http://www.numdam.org/item/SDPP_1971-1972__13_2_A10_0}
}

Halberstam, Heini. The distribution of sequences in arithmetic progressions. Séminaire Delange-Pisot-Poitou. Théorie des nombres, Volume 13 (1971-1972) no. 2, Talk no. 25, 5 p. http://www.numdam.org/item/SDPP_1971-1972__13_2_A10_0/

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