"Balance: Art and Nature", Black Rose Books, 1994, 2003 ISBN 1-55164-234-4* Eleanor Heartney, "Andrew Rogers Geoglyphs, Rhythms of Life", Edizioni Charta srl, Italy, 2009 ISBN 978-88-8158-712-4* Robert Hobbs, Robert Smithson: "A Retrospective View", Wilhelm Lehmbruck Museum, Duisburg / Herbert F. Johnson Museum of Art, Cornell University,* Jeffrey Kastner, Brian Wallis: "Land and Environmental Art".
"Balance: Art and Nature", Black Rose Books, 1994, 2003 ISBN 1-55164-234-4* Eleanor Heartney, "Andrew Rogers Geoglyphs, Rhythms of Life", Edizioni Charta srl, Italy, 2009 ISBN 978-88-8158-712-4* Robert Hobbs, Robert Smithson: "A Retrospective View", Wilhelm Lehmbruck Museum, Duisburg / Herbert F. Johnson Museum of Art, Cornell University,* Jeffrey Kastner, Brian Wallis: "Land and Environmental Art".