Capital 
A Critique of Political Economy

Volume I Book One: 
The Process of Production of Capital

First published: in German in 1867, English edition first published in 1887;
Source: First English edition of 1887 (4th German edition changes included as indicated) with some modernisation of spelling;
Publisher: Progress Publishers, Moscow, USSR;
Translated: Samuel Moore and Edward Aveling, edited by Frederick Engels; Transcribed: Zodiac, Hinrich Kuhls, Allan Thurrott, Bill McDorman, Bert Schultz and Martha Gimenez (1995-1996); Proofed: by Andy Blunden and Chris Clayton (2008), Mark Harris (2010), Dave Allinson (2015).

https://www.marxists.org/archive/marx/works/download/pdf/Capital-Volume-I.pdf

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Capital 
A Critique of Political Economy 

Volume II Book One
The Process of   Circulation of Capital 
Edited by Friedrich Engels

Written: in draft by Marx 1863-1878,
edited for publication by Engels; First published: in German in 1885, authoritative revised edition in 1893;
Source: First English edition of 1907; Published: Progress Publishers, Moscow, 1956, USSR; Transcribed: by Doug Hockin and Marxists Internet Archive volunteers in the Philippines in 1997; Proofed: and corrected by Andy Blunden and Chris Clayton (2008), Mark Harris (2010).

https://www.marxists.org/archive/marx/works/download/pdf/Capital-Volume-II.pdf

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Karl Marx CAPITAL 

Vol. III 
THE PROCESS OF CAPITALIST PRODUCTION AS A WHOLE

Written: Karl Marx, 1863-1883, 
edited by Friedrick Engels and completed by him eleven years after Marx's death. 
Source: Institute of Marxism-Leninism, USSR, 1959 Publisher: International Publishers, NY, [n.d.] First Published: 1894 Translated: On-Line Version: Marx.org 1996, Marxists.org 1999 Transcribed: Transcribed for the Internet in 1996 by Hinrich Kuhls and Zodiac, and by Tim Delaney and M. Griffin in 1999. HTML Markup: Zodiac 1996, Tim Delaney and M. Griffin in 1999

https://www.marxists.org/archive/marx/works/download/Marx_Capital_Vol_3.pdf