Richardson, Samuel
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Dent, 1932
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Ensiklopedi anak nasional, vol. 4
Jakarta : Cipta Adi Pustaka, 1991,
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The Encyclopedia of higher education vol. 4
Burton R. Clark, Guy R. Neave, editors-in-chief
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Encyclopeida of statistical scinces Vol. 4
Samuel Kotz, Norman L. Johnson, editors-in-chief
John Wiley & Sons, Inc., 1982
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Bioorganic marine chemistry, Vol. 4
edited by Paul J. Scheuer
Springer-Verlag, 1988
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