column
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1986, 7(3): 243-249.
1986, 7(3): 251-254.
1986, 7(3): 255-261.
1986, 7(3): 272-280.
1986, 7(3): 281-286.
1986, 7(3): 287-292.
1986, 7(3): 293-296.
1986, 7(3): 297-310.