| Take a
quick break: a survey |
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| ¡ | How much do you
value your library? |
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| ¡ | Take a guess! |
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| ¡ | Here’s are some
ways to do it. |
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| l | What’s the cost
of buying the sources yourself? |
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| l | What’s the
opportunity cost if you didn’t have |
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| access to the
information? |
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