Lennart NILSSON (1922-2017) Scientific photograph, circa 1971 (cell resembling a snowflake, scientific photograph). Vintage silver print mounted on wood and cork. On front of visual, lower right, author and date (1971). Visual size approx. 39.7 x 29.5 x 1 cm. Scratches, marks and stains on visual. Craftsman" frame with detachments. Provenance: The photographer offered this photograph to the seller's parents to thank them for their scientific collaboration.