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2 results for: circle contains two lighter square

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Two microscopic enlargements of an algae, page, photomechanical print, number: 'Taf. X.', cliché
LZT26A79_256

Two microscopic enlargements of an algae, page, ph...

Six microscopic enlargements of minerals, page, photomechanical print, Image 1 is nepheline, 2 is
LZT26B00_207

Six microscopic enlargements of minerals, page, ph...