Page:Library of Congress Classification Outline.djvu/272

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Subclass SD

SD1-669.5 Forestry
SD11-115 Documents
SD119 Voyages, etc.
SD131-247.5 History of forestry. Forest conditions
SD250-363.3 Forestry education
SD388 Forestry machinery and engineering
SD388.5 Tools and implements
SD389 Forest roads
SD390-390.43 Forest soils
SD390.5-390.7 Forest meteorology. Forest microclimatology
SD391-410.9 Sylviculture
SD411-428 Conservation and protection
Including forest influences, damage by elements, fires, forest reserves
SD430-(559) Exploitation and utilization
Including timber trees, fuelwood, logging, transportation, valuation
SD561-669.5 Administration. Policy