How to use the Open Courseware Directory (OCD)1 -- Make an initial subject selection from the subject areaas above (e.g. 'Physical Sciences'). 2 -- Choose a specific subject (e.g. 'Physics' from 'Physical Sciences' menu above). 3 -- Refine with terms from 'Media Type' and 'Level' to restrict the results (e.g. 'Video' to find all video OCW for physics). Who's onlineThere are currently 0 users and 5 guests online.
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Lecture notes on the Major Soils of the Worldworld reference base for soil resources, reference soil groups, organic soils, mineral soils conditioned by (man, parent material, topography, limited age, a wet (sub)tropical climate, a (semi-)arid climate, a steppic climate, (sub)humid temperate climate, permafrost), references
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