Kenneth Koch

Gododdin: The Oldest Scottish poem. Edinburgh: Edinburgh University Press. Koch, John T. (1997). The Gododdin of Aneurin: Text and context from Dark-Age

Patrick. Studies on Celtic Languages before the Year 1000. CMCS. 2007: 1.  Koch, John. Celtic Culture: A Historical Encyclopedia. ABC-CLIO. 2006: 1455. 

Springer. 1997: 398. ISBN 978-0-412-60870-4.  Whiteley, Kenneth S.; Heggs, T. Geoffrey; Koch, Hartmut; Mawer, Ralph L.; Immel, Wolfgang, Polyolefins,

584,000人，其中能使用凱爾特系語言諸語的人口約有2,882,100人。近年在凱爾特地區，能使用凱爾特語言的人口有所增加。 Koch, John. Celtic Culture : A Historical Encyclopedia. ABL-CIO. 2005: xx, 300

2008: 187–203. ISBN 978-1-900289-90-0.  Koch, John T. Celtic Culture: a historical encyclopedia. ABC-CLIO. 2006.  Koch, John T. Celtic Culture: a historical