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Multilingual
1
Skelton, R A, 980.1-S627m | The University of Chicago press | 1975 980.1-S627m,
2
Skelton, Robert E., 559.9-S627d | John Wiley & Sons | 1988 559.9-S627d,
3
Byrne, Robert, 844-B995e | Atheneum | 1989 844-B995e,
4
Skelton, Robin., 802.1-S627p | Happer and Row Publishers | 1981 802.1-S627p,
5
Skelton, Luther W, 563.7-S627s | Van Nostrand Reinhold | 1984 563.7-S627s,