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<Problem Summary> <Problem Detail> <Solution Outline> <Whether/How Much $ It's Worth To a Customer> I wonder what's the earliest copyright date on a busines
by runako 10y ago
<Problem Summary>
<Problem Detail>
<Solution Outline>
<Whether/How Much $ It's Worth To a Customer>
I wonder what's the earliest copyright date on a business-plan book that contains this exact format for validating business ideas.