The National Geographic Magazine, Volume 87National Geographic Society, 1945 - Geography Indexes kept up to date with supplements. |
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Page 721
... birds and then to analyze the visible sound- track record and compute the exact changes in pitch of a bird's song . Indeed , the late Albert R. Brand , who started the bird - song recording project at Cornell , did exactly this for more ...
... birds and then to analyze the visible sound- track record and compute the exact changes in pitch of a bird's song . Indeed , the late Albert R. Brand , who started the bird - song recording project at Cornell , did exactly this for more ...
Page 726
... birds Van Dersal lists pass through my grounds every fall and spring , it stands inviolate . Similarly the high - bush cranberry , relished by birds in New England , where it is native , is recommended by landscape gardeners else- where ...
... birds Van Dersal lists pass through my grounds every fall and spring , it stands inviolate . Similarly the high - bush cranberry , relished by birds in New England , where it is native , is recommended by landscape gardeners else- where ...
Page 727
... birds started preening when they were six days old , they did not scratch until they were seven and did not start bathing until they were thirteen . These were all activities in which the young bird would engage for the rest of its life ...
... birds started preening when they were six days old , they did not scratch until they were seven and did not start bathing until they were thirteen . These were all activities in which the young bird would engage for the rest of its life ...
Contents
Americans Help Liberated Europe Live Again By Lt Col Frederick Simpich Jr 747 | v |
Battleship Missouri Comes of Age II illustrations in color from official U S Navy | xix |
BornholmDenmark in a Nutshell By Mason Sutherland 239 | xxxviii |
Copyright | |
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