G. Ruhnke

Cross contamination of lead and cadmium during dry ashing of food samples

P. Fecher, G. Ruhnke, 2002, Analytical and bioanalytical chemistry.

Determination of arsenic and selenium in foodstuffs : methods and errors

P. Fecher, G. Ruhnke, 1998 .

The effects of starvation.

G. Ruhnke, H. Hackenthal, 1949 .

Soil acidity and liming

G. Ruhnke, R. Harcourt, S. Waterman, 1925 .

STUDIES ON READILY SOLUBLE PHOSPHATE IN SOILS: III. THE EFFECT OF PHOSPHATE TREATMENT

G. Ruhnke, H. Lohse, 1933 .

Report of the Committee on Nomenclature

C. F. Shaw, G. W. Conrey, G. N. Ruhnke, 1935 .