The Family magazine 'Die Taube' (The Dove) which has been almost continually published twice per annum since 1886http://www.genealogienetz.de/vereine/GFKW/rundschreiben/gfkwrund189.pdf is still published today in both German and English. The latest edition of the 'Silver Book' was published in 2010 and included the data on over 17,500 descendants and was of some 566 pages, 310 x 230 mm.http://www.sackstiftung.de/en/node/19
