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pH Article on 3.5" Floppy ($3.50 + $3.95 Shipping & HandlingOrders are usually shipped within 3-5 business days.

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pH Article in PDF format - Electronic Download ($2.95 + NO Shipping) (~ 750 KB) An e-mail with instructions for downloading the article will be sent to you as soon as your order is processed (within 24-48 hours).

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