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холкерский ярус
stresses
geol.
Hlk
(
MichaelBurov
)
;
Holkerian
(
MichaelBurov
)
stratigr.
Holkerian Stage
(
MichaelBurov
)
;
Holkerian strata
(
MichaelBurov
)
;
Holkerian sequence
(
MichaelBurov
)
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