This work has different contents from The Revolutions of 1848 (Political Writings, Vol. 1) (e.g. it doesn't contain the Communist Manifesto, AFAICT) and should therefore not be combined with that work.

FWIW, The publisher's note of one edition reads: "The translation has been made from Marx/Engles, Werke, Band 5 and Band 6, Dietz Verlag, Berlin.... [It] is a selected cross-section of articles and editorials; the complete Neue Rheinische Zeitung writings by Marx and Engels will be published in the English Edition of the Collected Works...."