...in 1906 and in 1912 obtained his doctorate for research in ornithology... 
John Albert Leach 「An Australian Bird Book」
...This is aselected part of the author's doctorate thesis...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
ランダム例文：
extraneous champs infamous
便利！手書き漢字入力検索