<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2017) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Th_colspan="2"> "What Is and What Should Never Be" </Th> </Tr> <Tr> <Th_colspan="2"> Song by Led Zeppelin </Th> </Tr> <Tr> <Th_colspan="2"> from the album Led Zeppelin II </Th> </Tr> <Tr> <Th> Released </Th> <Td> 22 October 1969 (1969 - 10 - 22) </Td> </Tr> <Tr> <Th> Format </Th> <Td> LP record </Td> </Tr> <Tr> <Th> Recorded </Th> <Td> January 1969 </Td> </Tr> <Tr> <Th> Studio </Th> <Td> Olympic, London </Td> </Tr> <Tr> <Th> Length </Th> <Td> 4: 47 </Td> </Tr> <Tr> <Th> Label </Th> <Td> Atlantic </Td> </Tr> <Tr> <Th> Songwriter (s) </Th> <Td> Jimmy Page, Robert Plant </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Jimmy Page </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "What Is and What Should Never Be" </Th> </Tr>

What is and what should never be live