1
The uptake of colloidal organic substances by plant roots as shown by experiments with 14C labelled humus compounds [E-Book] /
2
Tracer studies of the reaction of soil organic matter with nitrite : FAO/IAEA technical meeting: report : Braunschweig, 09.09.63-14.09.63 [E-Book] /
3
Experiences on labelling whole plants with carbon 14 : FAO/IAEA technical meeting: report : Braunschweig, 09.09.63-14.09.63 [E-Book] /