Page:Library of Congress Classification Outline.djvu/244

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Subclass QH

QH1-278.5 Natural history (General)
QH1-(199.5)   General
Including nature conservation, geographical distribution
QH201-278.5 Microscopy
QH301-705.5 Biology (General)
QH359-425 Evolution
QH426-470 Genetics
QH471-489 Reproduction
QH501-531 Life
QH540-549.5 Ecology
QH573-671 Cytology
QH705-705.5 Economic biology