Paul K. Withers
Books
The contemporary diesel spotters guide
2000
ISBN 9781881411253- No cover
The Contemporary Diesel Spotter's Guide 2008
2010
ISBN 9781881411536 
Southern Railway
1987
ISBN 9780961850302
Norfolk and Western Railway
1989
ISBN 9780961850333
Conrail motive power, 1986-1991
1992
ISBN 9780961850395
Diesels of the Chicago & North Western
1995
ISBN 9781881411079
Norfolk Southern, 1982-1994
1995
ISBN 9781881411048
Conrail, the final years, 1992-1997
1997
ISBN 9781881411154
Diesels of the Southern Railway 1939-1982
1997
ISBN 9781881411093
Norfolk Southern Locomotive Directory 1998-1999
1998
ISBN 9781881411185
Emd's SW8
2001
ISBN 9781881411338
Pennnsylvania Railroad Diesel Locomotive Pictorial Volume 10
2006
ISBN 9781881411482
Norfolk Southern Locomotive Directory 2006-2007
2007
ISBN 9781881411499