Micrometer, x 200, 2001 by Y. Tsukii 100 μm 200 μm 300 μm; x 200
Micrometer, x 400, 2001 by Y. Tsukii 50 μm 100 μm 150 μm; x 400
Micrometer, x 640, 2001 by Y. Tsukii 31 μm 63 μm 94 μm; x 640