The Science of Nature
The Science of Nature > 1994 > 81 > 10 > 443-448
The Science of Nature > 1994 > 81 > 10 > 430-442
The Science of Nature > 1994 > 81 > 10 > 423-429
The Science of Nature > 1994 > 81 > 11 > 489-497
The Science of Nature > 1994 > 81 > 11 > 473-480
The Science of Nature > 1994 > 81 > 11 > 481-488