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  1. 1

    Groups of homotopy classes by Arkowitz, M, Curjel, C. R

    Published 1967
    Book
  2. 2

    Homotopy equivalences of 3-manifolds with boundaries by Johannson, Klaus

    Published 1979
    Book
  3. 3

    Classifying immersions into R4 over stable maps of 3-manifolds into R2 by Levine, Harold

    Published 1985
    Book
  4. 4

    Obstruction theory by Spanier, E. H

    Published 1966
    Book