Books
The World Encyclopedia of Comics
1976
ISBN 9780877540427
Smithsonian Collection of Newspaper Comics
1978
ISBN 9780686679998
Sherlock Holmes in America
1981
ISBN 9780810916098
Great comic cats
1981
ISBN 9780898440102
The Comic strip century
1995
ISBN 9780878163557
Krazy Ignatz Love In A Kestle Or Love In A Hut Convening The Fullpage Comic Strips 19161918
2010
ISBN 9781606993163
100 Years of Comic Strips
ISBN 9780760761052