Specification 93
editor, Alan Williams
Emap Architecture, 1993
Buku Referensi
Specification 93 clauses
editor, Alan Williams
Emap, 1993
Buku Referensi
Specification 93 Technical
edited by Alan Williams
Emap, 1993
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Willis, Claire
Abstraction and specification with modula-2
Pitman, 1992
Buku Teks SO
Rosa, Frank
Water treatment specification manual
McGraw-Hill, 1985
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