We have found evidence for a large, elongated group of at least ten quasars with largest dimension |~ 100-200 \,h⁻¹| Mpc at z~ 1.3, in the direction of ESO/SERC field 927, which has the field centre (1950) |[10ʰ 40ᵐ 00ˢ, 05^∘ 00^ 00^.]| There are probably further members that have not yet been observed. The morphology of the group seems to be like a clump, but there might be some sub-grouping on scales |~ 20 \,h⁻¹|Mpc.
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Clowes et al. (1991) studied this question.