Queen's Gambit Declined

Queen's Gambit Declined: Semi-Slav by Tim D. Harding (Chess Book) 9780713424485

Chessable - The aggressive Queen's Gambit Declined is

Unusual Queen's Gambit Declined by Chris Ward (Chess Book) 9781857442182

Queen's Gambit Declined Janowski Variation - GM Miloje Ratkovic

Queen's Gambit Declined - Orthodox Variation

Queen's Gambit Declined: D30-D39: Tactical Puzzles from Miniatures - Harvey, Bill: 9781537184623 - AbeBooks

Elephant Trap in Queens Gambit Declined Variation, Chess Opening Trap, Queens Gambit

Queen's gambit declined : Bg5 systems : Lalic, Bogdan : Free Download, Borrow, and Streaming : Internet Archive

Expert Repertoire against Queen's Gambit Declined

The Queen's Gambit Declined - How to Play It as White and Black - Chessable Blog