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Prentice Hall
> Ruben L. Parson
Ruben L. Parson
title
ISBN-13
(ISBN-10)
year of publication
Conserving American Resources
978-O-13-167767-8
(O-13-167767-5)
1972
L.P.
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R. L
·
R.L. Parson
·
R. P.
Ruben Landsberger