Yes, that's very reasonable material to start off with. In the 7Rc1 I think there is a strange looking suggestion of responding with Nc6. It would be nice to know what IM pfren thinks of the quality of this?, or anyone else who has tried it out.
Queens Gambit Declined as Black
Thank you so much!.. its helping me to study a lot about it :)
IM Prefen? can you help me more if you dont mind? If yes i will ask my questions!

Kasparov's books on matches with Karpov, or "Test of time" are hard to beat for quality analysis of complete games with Queen's Gambit declined. Most of the games are based around Tartakower rather than Lasker. Starting off, wouldn't matter too much switching between two, and learning principals. The more recent "Kasparov on modern chess" series has nice chessbase versions can flick through too.

There are an interesting series of videos here on Chess.com on the English Defense, which works against 1.d4 or 1. c4, by GM Simon Williams. The move order, for the Queen's Gambit Declined, is 1. d4 e6 2. c4 b6. It's one of the few defenses I can use with success against my chess computer. You eventually develop your bishop to b7 and, if white doesn't play a3, the other bishop to b4. There is a "lever move" involving playing f5. I've found that regular QGD players get a little confused because they don't see this so often, so it's fun to trot out as a surprise. There is a book on it called "English Defense" by Daniel King (Everyman Chess, 1999). Game Explorer gives good chances for black, at least through the first four moves. Simon also has a video on the English Defense on You Tube:
LIVE GM Blitz Chess! #16 The English Defence - Part 1

You might also study the games of top players who have played the Black side - Anand, Topalov, Kramnik have all played a number of QGD games. Playing over them gives you a sense not only of the opening moves, but also of the middlegame plans and even the typical endgames which may arise. It is a better guide than just memorizing opening variations which end with "a slight plus for White" or "the position is equal" and no clue what to do from there.

You might also study the games of top players who have played the Black side - Anand, Topalov, Kramnik have all played a number of QGD games. Playing over them gives you a sense not only of the opening moves, but also of the middlegame plans and even the typical endgames which may arise. It is a better guide than just memorizing opening variations which end with "a slight plus for White" or "the position is equal" and no clue what to do from there.
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Can you please help me in some variations for how to play queens gambit declined as black? i want to know how to reply for queens gambit as black?