1
Published 1985
...R.R. Bowker Company....
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2
...R.R. Bowker Company....
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3
...R.R. Bowker Company....
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4
Published 1988
...R.R. Bowker Company....
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5
...R.R. Bowker Company....
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6
Published 1989
...R.R. Bowker Company. Database Publishing Group....

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7
Published 1961
...R.R. Bowker Company....

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