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Start Over Author Interior Dept. Catalog Issue Year Decade 1960 - 1969

491. Gypsum; [by Paul L. Allsman].

Corporate/Agency Authors:
Mines Bureau and Interior Dept.
Publisher:
Mines Bureau
Date:
[1968.]
SuDoc number:
I 28.37/a:G 998/967

493. Hawaii Volcanoes National Park, Hawaii.

Corporate/Agency Authors:
National Park Service and Interior Dept.
Publisher:
National Park Service
Date:
[Revised 1968.] [1968.]
SuDoc number:
I 29.6:H 31/2/968

494. Helium; [by Edwin M. Thomasson].

Corporate/Agency Authors:
Mines Bureau and Interior Dept.
Publisher:
Mines Bureau
Date:
[1968.]
SuDoc number:
I 28.37/a:H 367/967

496. Hoover Dam.

Corporate/Agency Authors:
Reclamation Bureau and Interior Dept.
Publisher:
Reclamation Bureau
Date:
[1968.]
SuDoc number:
I 27.2:H 76/4/968

497. Hopewell Village National Historic Site, Pa.

Corporate/Agency Authors:
National Park Service and Interior Dept.
Publisher:
National Park Service
Date:
[1968.]
SuDoc number:
I 29.21:H 77/968 and I 29.21:H 77/2/968

498. Hot Springs National Park, Ark.

Corporate/Agency Authors:
National Park Service and Interior Dept.
Publisher:
National Park Service
Date:
[1968.]
SuDoc number:
I 29.6:H 79/9/968

499. Hydrologic cycle.

Corporate/Agency Authors:
Geological Survey and Interior Dept.
Publisher:
Geological Survey
Date:
[1968.]
SuDoc number:
I 19.2:H 99/5