Alma Baker's work
The Labouring Earth : a Survey of Agricultural Conditions At Home and Abroad / by C. Alma Baker … with an Introduction by the Rt. Hon. Lord Addison
This broad, world-wide survey was primarily done from a biodynamic point of view and with considerable acknowledgment for the contributions of Sir Albert Howard.
A biodynamic tour de force by a colonial land owner who is deeply impressed with Biodynamics for rejuvenation exhausted land. It appears in many organic bibliographies as a seminal work of late 1930s concern for a new relationship to health and the land.