Aggregate  (SIMBAD class: Cl* = Cluster of Stars)
   Ref:=1953ApJ...118..318M
     byMORGAN W.W.
, WHITFORD A.E., CODE A.D.
 Astrophys. J., 118, 318-322 (1953)

    Studies in galactic structure. I. A preliminary determination of the
    space distribution of the blue giants.
oTable 1: <[MWC53] R CCC> N=27.
   Ref:=1958AN....284...76S
     bySCHMIDT K.-H.

 Astron. Nachr., 284, 76-78 (1958)

    Verzeichnis von 63 O- und B-Sterngruppen.

oTable: <[MWC53] R CCC> N=36 added.
   Ref:=1964ARA&A...2..213B
     byBLAAUW A.

 Annual Rev. Astron. Astrophys., 2, 213-246 (1964)

    The O associations in the solar neighborhood.

oTable I: <[MWC53] R CCC> N=1 added (II Mon). Table II: <[MWC53] Ra    CCC> N=8.
 Originof the Acronym: L = Found in the literature

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