no. 4
Equivalence of almost periodic compactifications
Compositio Mathematica, Tome 22 (1970) no. 4, pp. 453-456 
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     author = {de Vries, J.},
     title = {Equivalence of almost periodic compactifications},
     journal = {Compositio Mathematica},
     pages = {453--456},
     year = {1970},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {22},
     number = {4},
     mrnumber = {276404},
     zbl = {0205.42101},
     language = {en},
     url = {https://www.numdam.org/item/CM_1970__22_4_453_0/}
}
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de Vries, J. Equivalence of almost periodic compactifications. Compositio Mathematica, Tome 22 (1970) no. 4, pp. 453-456. https://www.numdam.org/item/CM_1970__22_4_453_0/

K. De Leeuw AND I. Glicksberg [1] Applications of almost periodic compactifications, Acta Math. 105 (1961), 63-97. | Zbl | MR

J.F. Berglund And K.H. Hofmann [2] Compact Semitopological Semigroups and Weakly Almost Periodic Functions, Lecture Notes in Mathematics 42, Springer, Berlin, 1967. | Zbl | MR

J.L. Kelley [3] General Topology, Van Nostrand, New York, 1955. | Zbl | MR