Who owns whom.
London : O.W. Roskill,
1961-1976.
"A directory of parent, associate and subsidiary companies in industry and commerce."
Titles of vols. 1 and 2 vary slightly.
Issued in 2 vols: vol. 1.--Austria, Western Germany, Switzerland (including Liechtenstein), Denmark, Finland, Sweden and Norway; vol. 2.-- Belgium and Luxembourg, France, Holland, Italy, Portugal and Spain.
Prior to 1961, information included in: Who owns whom:  U.K. edition.
Corporations
Holding companies
Who owns whom. Continental Europe