New Dinosaur theory

New Dinosaur theory

Issue 906

15th Jan,1979

The Tektite puzzle

The Tektite puzzle

Issue 907

22nd Jan,1979

Methane - underground energy

Methane - underground energy

Issue 911

19th Feb,1979

Oil shales : energy crisis

Oil shales : energy crisis

Issue 930

2nd Jul,1979

Volcanic gasses and the air

Volcanic gasses and the air

Issue 931

9th Jul,1979

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