An eolaı́ocht ón tús leabhar an dalta
Hampson, B. L.(Brian Lloyd),1921-
Evans, K. C.(Kenneth Cedric),1914-
Ó Murchú, Livín.
Baile Atha Cliath Oifig an tSolathair,
1982
Originally published: Edinburgh : Oliver & Boyd, 1962 as Science from the beginning 3
Science