The symphony was, for all intents and purposes, brought into being by Josef Haydn and his 104+ symphonies stand as one of the great monuments of the genre.

It has become traditional to refer to a composers output of symphonies as "a cycle" although there is rarely anything cyclic about them. 

Beethoven - Symphonies
Brahms - Symphonies
Bruckner - Symphonies
Elgar - Symphonies
Haydn - Symphonies
Mahler - Symphonies
Mendelssohn - Symphonies
Mozart - Symphonies
Other Symphonies
Schubert - Symphonies
Shostakovitch - Symphonies
Sibelius - Symphonies
Tchaikovsky - Symphonies
Vaughan Williams - Symphonies
Walton - Symphonies

Ludwig van Beethoven: Major Works For Orchestra Composed by Ludwig van Beethoven (1770-1827). CD Sheet Music for orchestra. Printable and viewable for PC and Macintosh. Full Scores to all of the major works for orchestra by Beethoven - parts not included. 1900 printable pages. Published by Theodore Presser Co. (PR.816600010) See more info...

Ludwig van Beethoven: The Nine Symphonies Composed by Ludwig van Beethoven (1770-1827), edited by Jonathan Del Mar. Study scores (9 paperbound volumes in slipcase) for mixed orchestra. Urtext. With introductory text. 1107 pages. Published by Baerenreiter-Taschenpartituren (German import). (BA.TP900) See more info...