Steven H. Pilcher has written:
'Unimak quadrangle' -- subject(s): Mines and mineral resources,
Ore deposits
'Simeonof Island quadrangle' -- subject(s): Mines and mineral
resources, Ore deposits
'Gareloi Island quadrangle' -- subject(s): Mines and mineral
resources, Ore deposits
'Umnak quadrangle' -- subject(s): Mines and mineral resources,
Ore deposits
'Umnak quadrangle' -- subject(s): Mines and mineral resources,
Ore deposits
'Ugashik quadrangle' -- subject(s): Mines and mineral resources,
Ore deposits
'Rat Islands quadrangle' -- subject(s): Mines and mineral
resources, Ore deposits
'Rat Islands quadrangle' -- subject(s): Mines and mineral
resources, Ore deposits