28.
29.
Fourier Series and Boundary Value Problems - Ruel Vance Churchill - Hardcover - 4th ed
by Churchill, Ruel V., Brown, ...
ISBN: 9780070108813
30.
Complex Variables and Applications - Ruel Vance Churchill - Hardcover - 3d ed
by Churchill, Ruel V., Brown, ...
ISBN: 9780070108554
List Price: $42.95
33.
Complex Variables and Applications (Brown and Churchill) (9th English Edition)
by James Brown, Ruel Churchill
ISBN: 9780169548230