...The fluctuations in theuse of wheat were due to fluctuations in the availability of other foodsthat were preferred... 
Dwight Platt 「Food of the Crow, Corvus brachyrhynchos Brehm, in South-central Kansas」
...), forwhich the chief consideration seems to be availability of coniferseeds...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Its availability forthat purpose has, however, been seriously questionedby Professor Newcomb...
George Chambers 「The Story of Eclipses」
...In Hume's case, therewas no ill-founded conclusion of the availability of thefreshly-discovered district...
Ernest Favenc 「The Explorers of Australia and their Life-work」
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