Analysis of information sources in references of the Wikipedia article "Camera lucida" in English language version.
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ignored (help)Wollaston, William H. 'An Instrument Whereby Any Person May Draw in Perspective, or May Copy of Reduce Any Print or Drawing.' British Patent no. 2993
Wollaston, William H. 'An Instrument Whereby Any Person May Draw in Perspective, or May Copy of Reduce Any Print or Drawing.' British Patent no. 2993
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