Scanning electron microscopy.

1978 no.1; 1978 no.2; 1978 v.1; v.1 1978; 1978 v.2; v.2 1978; 1979 no.1; 1979 no.2; 1979 no.3; 1979 v.1; v.1 1979; 1979 v.2; v.2 1979; 1979 v.3; v.3 1979; 1980 no.1; 1980 no.2; 1980 no.3; 1980 no.4; 1980 v.1; v.1 1980; 1980 v.2; v.2 1980; 1980 v.3; v.3 1980; 1980 v.4; v.4 1980; 1981 no.1; 1981 no.2; 1981 no.3; 1981 no.4; 1981 v.1; v.1 1981; 1981 v.2; v.2 1981; 1981 v.3; v.3 1981; 1981 v.4; v.4 1981; 1982 no.1; 1982 no.2; 1982 no.3; 1982 no.4; 1982 v.1; v.1 1982; 1982 v.2; v.2 1982; 1982 v.3; v.3 1982; v.4 1982; 1982 v.4; 1983 no.2; 1983 pt.3; 1983 pt.4; 1983 v.1; v.1 1983; v.2 1983; 1983 v.2; v.3 1983; 1983 v.3; v.4 1983; 1983 v.4; 1984 no.1; 1984 no.2; 1984 pt.3; 1984 no.4; v.1 1984; v.2 1984; 1984 v.2; v.3 1984; v.4 1984; v.1 1985; v.2 1985; v.3 1985; v.4 1985; v.1 1986; v.2 1986; 1986 v.3; v.3 1986; v.4 1986