Designing filters using fourier series

Hi,

I did an EE degree several years ago now, and obviously covered things
such as fourier series and filter design. What I never covered was how
to get component values from the fourier seires.

Can anyone recommned either some online resource or a book that I can
buy? I've had a rumage through the IEEE archieves and obviously a
google seach but cant find a few basic examples to get me going

Thanks in advance

David

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