McGraw-Hill encyclopedia of science & technology : vol. 13 PAC-PLAN
McGraw-Hill, 1987
Buku Referensi
McGraw-Hill encyclopedia of science & technology; Vol. 13 PAC-PLAN
McGraw-Hill, 1992
Buku Referensi
McGraw-Hill encyclopedia of science & technology. 13, PAR-PLAN
McGraw-Hill
McGraw-Hill, 2012
Buku Referensi
Grolier academic encyclopedia 13
London: Grolier International, 1991,
Buku Referensi
Science
American Association for the Advancement of Science, 2018
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