Measurement of Consumer Interest. (Conf. on Experimental Method Sponsored by the Univ. of Pennsylvania, May 1946).

New (perfect condition)

Pages are clean and are not marked by notes, highlighting or fold.

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Pages are clean and are not marked by notes, highlighting or folds.

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Pages are intact and may have minimal notes and/or highlighting or folds.

Good (clean condition)

All pages and the cover is intact. The spine may show signs of wear. Pages include notes and/or highlighting.

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All pages and the cover is intact. Pages include considerable notes in pen or highlighter, but the text is not obscured.