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Books about Bockstein:
Bockstein basis and resolution theorems in extension theory. by Vera Tonic (Sep 4, 2011)
Wiki information Bockstein:
In homological algebra, the Bockstein homomorphism, introduced by Bockstein, is a connecting homomorphism associated with a short exact sequence 0 → P → Q → R → 0 of abelian groups, when they are introduced as coefficients into a chain complex C, and...
In mathematics, the Bockstein spectral sequence is a spectral sequence relating the homology with mod p coefficients and the homology reduced mod p. It is named after Meyer Bockstein.