no. 3
Correction to “On the purity of the branch locus”
Compositio Mathematica, Volume 26 (1973) no. 3, pp. 175-180.
corrects On the purity of the branch locus 
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Altman, Allen B.; Kleiman, Steven L. Correction to “On the purity of the branch locus”. Compositio Mathematica, Volume 26 (1973) no. 3, pp. 175-180. http://www.numdam.org/item/CM_1973__26_3_175_0/

A. Altman and S. Kleiman [1] Introduction to Grothendieck Duality Theory, Lecture Notes in Math. Vol. 146, Springer-Verlag (1970) (cited GD). | MR | Zbl

A. Altman and S. Kleiman [2] 'On the Purity of the Branch Locus,' Compositio Mathematica, Vol. 23, Fasc. 4, (1971) pp. 461-464. | Numdam | MR | Zbl

M. Atiyah and I. Macdonald [3] Introduction to Commutative Algebra, Addison-Wesley (1969). | MR | Zbl

A. Grothendieck and J. Dieudonné [4] Éléments de Géometrie Algébrique I, Springer-Verlag (1971) (cited EGA I). (Oblatum 12-II-1973). | Numdam | Zbl