column
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2000, 21(3): 177-180.
2000, 21(3): 187-191.
2000, 21(3): 192-198.
2000, 21(3): 210-217.
2000, 21(3): 218-226.
2000, 21(3): 227-230.
2000, 21(3): 231-237.
2000, 21(3): 238-244.
2000, 21(3): 252-255.