No masterpiece was ever created by a lazy artist. - Salvador Dali this is not Salvador Dali piece - just quote :)
Roy Lichtenstein (1963)
Anatomical Drawings Sketchbook ,Artist Study Resources for Art Students with thanks to Artist Simone Bianchi, How to Draw the Human Figure CAPI ::: Create Art Portfolio Ideas at milliande.com, Art School Portfolio Work Figure Drawing
Herbert Matter, Hands, from the Early Series, 1941
Sky and Water II - MC Escher, 1938 - #santospiritofirenze
Hand WIth Reflecting Globe - MC Escher, 1935...I wish he was still alive...