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Multilingual
1
Williams, Roger L., 371.01-W726o | Pennsylvania State University Press | 1991 371.01-W726o,
2
Williams, Roger M, 675.11-W726s | University of Illinois Press | 1981 675.11-W726s,
3
Pressman, Roger S., 569.92-P935n | John Wiley and Sons | 1981 569.92-P935n,