Croy, G. H. (2008). The energy trail -- where it is leading: An essay on what we can expect in the not too distant future. World Scientific.

Croy, George H. The Energy Trail -- Where It Is Leading: An Essay on What We Can Expect in the Not Too Distant Future. Singapore: World Scientific, 2008.

Croy, George H. The Energy Trail -- Where It Is Leading: An Essay on What We Can Expect in the Not Too Distant Future. World Scientific, 2008.