70264247
9781018032542
Hill, Levi L. is the author of 'Treatise on Heliochromy : Or, the Production of Pictures, by Means of Light, in Natural Colors. Embracing a Full, Plain, and Unreserved Description of the Process Known As the Hillotype, Including the Author's Newly Discovered Collodio-Chrome, or Natural', published 2022 under ISBN 9781018032542 and ISBN 1018032541.
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