TURNER, RALPH. B.1935.
Shaded contour diagram of Schröter's Valley, probably Tucson, AZ, 1974, ink and white gouache on gray acetate, coordinates and several topographical features labeled, inscribed "Measurements from Relief model _ R. Turner, 1974" at foot, 550 x 1170 mm, matted, framed.
A striking image of this lunar feature, showing Turner's calligraphic skill, which he first developed at college. He has written, "the calligraphy experience lies behind several other things that I got involved with such as the Relief Contour method of expressing topography" (rockcreekexperiment.com).