1991 Vol. 11, No. 2

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1991, 11(2): 97-105. doi: 10.11883/1001-1455(1991)02-0097-9
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1991, 11(2): 106-116. doi: 10.11883/1001-1455(1991)02-0106-11
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1991, 11(2): 117-126. doi: 10.11883/1001-1455(1991)02-0117-10
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1991, 11(2): 127-133. doi: 10.11883/1001-1455(1991)02-0127-7
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1991, 11(2): 134-138. doi: 10.11883/1001-1455(1991)02-0134-5
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1991, 11(2): 139-145. doi: 10.11883/1001-1455(1991)02-0139-7
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1991, 11(2): 146-152. doi: 10.11883/1001-1455(1991)02-0146-7
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1991, 11(2): 153-160. doi: 10.11883/1001-1455(1991)02-0153-8
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1991, 11(2): 161-169. doi: 10.11883/1001-1455(1991)02-0161-9
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1991, 11(2): 170-176. doi: 10.11883/1001-1455(1991)02-0170-7
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1991, 11(2): 177-180. doi: 10.11883/1001-1455(1991)02-0177-4
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1991, 11(2): 181-181. doi: 10.11883/1001-1455(1991)02-0181-1
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1991, 11(2): 182-191. doi: 10.11883/1001-1455(1991)02-0182-10
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