The Billboard issue of October 15, 1966 confirmed that the Chairman of the Board was back.
The reputation of the 1970 album among the group's fans and media has only grown in later years.
Signed by Frank Sinatra to Reprise, Lopez is forever associated with his hit version of Pete Seeger's 'If I Had A Hammer.'
A look at the life of the much-travelled, Philadelphia-born musician with the superior resumé.
A special Frank Sinatra lullaby album Baby Blue Eyes May The First Voice You Hear Be Mine for children and adults is released on 6 April on CD and 2LP
Frank Sinatra's daughter Tina has curated a collection of some of his best-loved recordings for a compilation for children and parents, out on 12 May 2017.