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Date and Time of the Query: 2019-06-16 T14:38:53 PDT
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For refcode 1987RMxAA..14..165P:
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Rev. Mexicana Astron. Astrof.
1987 vol. 14 p. 165
PEIMBERT M., TORRES-PEIMBERT S., FIERRO J.
Physical conditions of HII regions in the spiral galaxy M 101 and the pregalacti c helium abundance
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