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Page 1: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 2: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 3: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 4: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 5: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 6: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that
Page 7: wrs.webs.upv.eswrs.webs.upv.es/files/journals/vol 3_3_khalil.pdf · Egyptian reviewed studies (e.g. KHALIL et al., 1987 ; 1990) showed a general trend ABDELLA et al., indicating that