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	1.	Nonabelian algebraic topology: filtered spaces, crossed complexes, cubical homotopy groupoids/ Ronald Brown, Philip J.Higgins, Rafael Sivera, with contributions by Christopher D. Wensley and Sergei V. Soloviev. by Brown, Ronald, 1935- Higgins, Philip J, 1926- Sivera, Rafael Series: EMS tracts in mathematics ; 15. Publication details: Zürich: European Mathematical Society, c2011 Availability: Items available for loan: Castorina (1)Call number: 514.2 B877n 2011 IMPA. Found in Open Library: Place hold Add to cart (remove)
	2.	Nonabelian algebraic topology: filtered spaces, crossed complexes, cubical homotopy groupoids/ Ronald Brown, Philip J. Higgins, Rafael Sivera, with contributions by Christopher D. Wensley and Sergei V. Soloviev. by Brown, Ronald, 1935- Higgins, Philip J, 1926- Sivera, Rafael Series: EMS tracts in mathematics ; 15. Publisher: Zürich: European Mathematical Society, [2011] Availability: Items available for loan: Castorina (1)Call number: 514.2 B877n 2011 IMPA. Found in Open Library: Place hold Add to cart (remove)

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