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R.C. Penfold

titleISBN-13
(ISBN-10)		year of publication
A Simple Guide to Using Spreadsheets978-O-13-O6O867-3
(O-13-O6O867-X)		2001

C.P. · R. C. · R. P. · R. Penfold · R.R.C. Penfold

R. C. Penner