Survey I., 1990 - paper, clack ink, 21 x 27,4 cm
Survey II., 1990 - paper, clack ink, 21 x 27,4 cm
Survey III., 1990 - paper, clack ink, 21 x 27,4 cm
Survey IV., 1990 - paper, clack ink, 21 x 27,4 cm