Led Zeppelin did not put out the album Physical Graffiti in 1975.
Although the group was initially unpopular with critics , they achieved significant commercial success with albums such as Led Zeppelin -LRB- 1969 -RRB- , Led Zeppelin II -LRB- 1969 -RRB- , Led Zeppelin III -LRB- 1970 -RRB- , Led Zeppelin IV -LRB- 1971 -RRB- , Houses of the Holy -LRB- 1973 -RRB- , and Physical Graffiti -LRB- 1975 -RRB- .	Led Zeppelin	Led Zeppelin (album)	Led Zeppelin II	Led Zeppelin II	Led Zeppelin III	Led Zeppelin III	Led Zeppelin IV	Led Zeppelin IV	Houses of the Holy	Houses of the Holy	Physical Graffiti	Physical Graffiti
