Heit, Laura. Animation sketchbooks / Laura Heit. - London : Thames & Hudson, 2013. - 320 p. : ill. ; 30 cm. Includes bibliographical references. ISBN: 9780500516751 Subjects--Topical Terms: Artists' preparatory studies.Animated films. LC Class. No.: N7433.5 / .H445 2013 Dewey Class. No.: 741.58 / HLA