Access Year:  From 1979 To 1997 | Publisher:  SPRINGER 

Access Year:  From 1986 To 1997 | Publisher:  SPRINGER 

Access Year:  From 1893 To 1900 | Publisher:  JSTOR 

Access Year:  From 1977 To 2005 | Publisher:  JSTOR 

Access Year:  From 1968 To 1987 | Publisher:  JSTOR 

Access Year:  From 1995 To Present | Publisher:  ELSEVIER 

Access Year:  From 1980 To 1994 | Publisher:  ELSEVIER 

Access Year:  From 1897 To 1899 | Publisher:  JSTOR 

Access Year:  From 1995 To Present | Publisher:  ELSEVIER 

Access Year:  From 1995 To Present | Publisher:  ELSEVIER 

Access Year:  From 1924 To Present | Publisher:  SPRINGER