1996 | ||
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2 | Margaret Beckman, John B. Black: The Local Library within the Worldwide Context: Changes, Directions, Realities. Essen Symposium 1996: 78-87 | |
1992 | ||
1 | Margaret Beckman, Ellen M. Pearson: Understanding the Needs of Users: The Timeliness Factor. Essen Symposium 1992: 307-320 |
1 | John B. Black | [2] |
2 | Ellen M. Pearson | [1] |