The research that has culminated in the pUblication being introduced . worldwide) save by one or two of this Manual was in the first place undertaken private conifer enthusiasts. My own efforts at 1 for a new edition of the book Manual of Cultivated recording data at Devizes made possible the Conifers by P. den Ouden and Dr B. K. Boom appearance in 1979 of a larger book: Manual of (both now deceased), published in 1965. Dwarf Conifers. That book was clearly in effect The claim in that book to have included every a partial up-dating of the den Ouden and Boom cultivar published since 1753 was...