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Multilingual
1
Maia, Nuno Manule Mendes, 550-M217t | Research Studies Press Ltd. | 1997 550-M217t,
2
Hansen, Volkert W, 566.5-H249n | Research Studies Press Ltd. | 1989 566.5-H249n,
3
Strouf., O., 433-S925c | Research Studies Press Ltd. | 1986 433-S925c,
4
Smith, John R, 560-S651t | Research Studies Press Ltd.aWiley | 1993 560-S651t,
5
Ewins, D. J., 530.24-E95m | Research Studies Press Ltd. | 1986 530.24-E95m,