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Items: 2

1.

A Simple Attachment to Increase Depth of Focus of Microscope Objectives for Photomicrography.

Pence RJ.

Science. 1948 Jun 11;107(2789):631-2. No abstract available.

PMID:
17797146
2.

A Simple Device to Increase Background Contrast in Photomicrography.

Pence RJ.

Science. 1947 May 9;105(2732):503-4. No abstract available.

PMID:
17796178

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