Complex sentence: The catalogue was published between 1964 and 1986 American Philatelic Research Library catalogue search 6 April 2009 and comprises nineteen alphabetical volumes with supplements and the earlier volumes were edited by the late Edward Fladung who worked with Alexander D. Gage in the production of the catalogue.
Split into simpler sentences: The catalogue was published between 1964 and 1986 American Philatelic Research Library catalogue search 6 April 2009 and comprises nineteen alphabetical volumes with supplements. The earlier volumes were edited by the late Edward Fladung who worked with Alexander D. Gage in the production of the catalogue.