Biodynamic Research References

Pfeiffer, E. (2004). Soil Fertility, Renewal and Preservation (2.ª ed., p. 212). Launceston, Cornwall, UK: The Lanthorn Press.

Pfeiffer, E. (1961). Comparative Soil Tests 1951-1961 of a Bio-Dynamic Farm. Biodynamics, (60), 1-11.

Pfeiffer, E. (1960). Biochemical Research Laboratory Annual Report. Biodynamics, (55), 1-15.

Pfeiffer, E. (1954). Seven Years of Soil Survey on a Biodynamic Farm. Biodynamics, (34), 2-19.