Tionscnaimh scoile le haghaidh éiceolaíochta
Crichton, Mary.
Ó Ceallacháin, C. N.
Foras Forbartha.
Baile átha Cliath (Teach Mháirtín, Bóthar Waterloo, Baile átha Cliath 4) An Foras Forbartha (Institute of Development)
1971
bibl p38-44
Biology