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Le Budget de l'Entreprise
Loeb, Paul, (1956)
Het Rekeningstelsel
Bakker, P., (1949)
Wagnisse und Steuern als Kosten- und Gewinnfaktoren
Klinger, Karl, (1948)
Municipal waste processing in Europe : a status report on selected materials and energy recovery projects
Abert, James G., (1985)
National Center for Resource Recovery, Inc. (NCRR)
Abert, James G., (1977)
The economics of resource recovery from municipal solid waste
Abert, James G., (1974)