Jethro tull así es jethro tull
This is the discography of the British progressive rock band Jethro Tull who formed in Luton , Bedfordshire, in December 1967. Initially playing blues rock , the band's sound soon incorporated elements of British folk music and hard rock to forge a progressive rock signature. The band were led by vocalist/flautist/guitarist Ian Anderson , and have included other significant members such as guitarist Martin Barre , drummer Doane Perry , and bassist Dave Pegg .
The group initially played as a three piece at local clubs and venues, before Evans became influenced by Georgie Fame and the Animals and switched to organ, recruiting drummer Barrie Barlow  and guitarist Mike Stevens from local band the Atlantics.   By 1964 the band had recruited guitarist Chris Riley  and developed into a six-piece blue-eyed soul band called the John Evan Band (later the John Evan Smash). Evans had shortened his surname to "Evan" at the insistence of Hammond, who thought it sounded better and more unusual. The group recruited Johnny Taylor as a booking agent and played gigs further afield around northwest England,  playing a mixture of blues and Motown covers.  Hammond subsequently quit the band to go to art school .  He was briefly replaced by Derek Ward, then by Glenn Cornick .  Riley also quit and was replaced by Neil Smith.  The group recorded three songs at Regent Sound Studios in Denmark Street , London in April 1967, and appeared at The Marquee club in June.