no. 2
Initial layers of Z l -extensions of complex quadratic fields
Compositio Mathematica, Tome 32 (1976) no. 2, pp. 157-168. 
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     author = {Carroll, J. E. and Kisilevsky, H.},
     title = {Initial layers of $Z_l$-extensions of complex quadratic fields},
     journal = {Compositio Mathematica},
     pages = {157--168},
     publisher = {Noordhoff International Publishing},
     volume = {32},
     number = {2},
     year = {1976},
     mrnumber = {406970},
     zbl = {0357.12003},
     language = {en},
     url = {http://www.numdam.org/item/CM_1976__32_2_157_0/}
}
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Carroll, J. E.; Kisilevsky, H. Initial layers of $Z_l$-extensions of complex quadratic fields. Compositio Mathematica, Tome 32 (1976) no. 2, pp. 157-168. http://www.numdam.org/item/CM_1976__32_2_157_0/

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