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1
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2Published 1978“...HB 141 .P117 3rd...”
Conference Proceeding Book -
3
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4
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5
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6
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7Published 1988“...HG 930.5 .I615...”
Book -
8
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9by Folkerts-Landau, D. F. I. (David Fokke Ihno), 1949-“...HB 1 .I61 p no.66...”
Published 1989
Book -
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11
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12
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13
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14Published 1997“...HG 924 .R335...”
Book -
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16
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18Published 1996“...HG 195 .F4905...”
Book -
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20