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Items: 2

1.

Helium policies.

Hammel EF, Krupka MC, Williamson KD Jr.

Science. 1984 Aug 24;225(4664):784-6. No abstract available.

PMID:
17801130
2.

The continuing u.s. Helium saga.

Hammel EF, Krupka MC, Williamson KD Jr.

Science. 1984 Feb 24;223(4638):789-92.

PMID:
17737740

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