TY  - DATA
AU  - Joyal, Andre.
AU  - Tierney, Myles,
TI  - An extension of the Galois theory of Grothendieck 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470407223 (online)
PY  - 1984///]
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0309
ER  -