Soils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regionsEugene W. HilgardSoils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regionsGOOpenStoriesOriginal author: Eugene W. HilgardPublishedNonfictionEugene W. Hilgard0 stars50 chapters197,099 words
