For the latter he needs investment, especially American exploration.

Halbouty was an outspoken proponent of increased American domestic exploration for oil and gas, rather than reliance on foreign sources.

The cultivation of grapes quickly followed American exploration.

American polar exploration was thenceforth bedeviled by controversy.

Annual spending for American exploration ranged from $3 billion to $4 billion in the 1987-91 period.

An exuberant paean to American planetary exploration, embedded in a detailed history of the space effort, by a veteran reporter.

With rivers seductively inviting American exploration, historians of the future who examine this film will find it easy to uncover its agenda.

In the early days of North American exploration, this phrase was common.

To hard-nosed companies, many of them Canadian and Australian, American exploration is a calculated risk.

Columbus had three ships on his first American exploration.