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- catalog contributor b5432326.
- catalog date "1947".
- catalog description "Bibliography: p. 473-476.".
- catalog description "Thesis (Ph. D.)--Harvard University, 1947.".
- catalog issued "1947".
- catalog language "eng".
- catalog subject "598.81".
- catalog subject "House sparrow Reproduction Effect of light on.".
- catalog subject "Light Physiological effect.".
- catalog subject "Photoperiodism.".
- catalog subject "QL1 .H3 vol.101, no.3".
- catalog subject "Reproduction.".
- catalog subject "Sparrows.".
- catalog title "The effect of light intensity and day length on reproduction in the English sparrow.".
- catalog type "text".