Ref129 - Secrets of the Soil

Reference No.: 129
Title: Secrets of the Soil
Author: Peter Tompkins, Christopher Bird
Primary Topic: Farming
Year: 1989
URL: https://books.google.com.au/books/about/Secrets_of_the_Soil.html?id=NLIdAQAAMAAJ&redir_esc=y

My notes on this reference

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