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Golygyddol Glyn O. Phillips. View Article
Cyfarchiad Cadeirydd Bwrdd Gwarchodaeth Natur D. W. Jones-Williams. View Article
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Cyfarchiad oddi wrth Tywysog Cymru View Article
Neges oddi wrth y Gwir Anrhydeddus George Thomas A. S., : Ysgrifennydd Gwladol Cymru George Thomas. View Article
Cyflwyniad i warchodaeth natur R. Elfyn Hughes. View Article
Dr R. Elfyn Hughes I. Ellis-Williams. View Article
Gwarchod yr amgylchfyd : problem ryngwladol / Tom Pritchard. View Article
Y Bwrdd Gwarchodaeth Natur yng Nghymru B. Ducker a G. Howells. View Article
Gwarchodleoedd Natur View Article
Ymchwil ecolegol ar warchodaeth yr amgylchfyd D.F. Perkins. View Article
Ymchwiliadau pridd D.F. Ball. View Article
Ymchwiliadau pridd M. Hornung. View Article
Ymchwil ar ddefnydd tir yn amgylchfyd yr ucheldir A. Buse. View Article
Ymchwil ar gadwraeth adar yng Nghymru P. Hope Jones. View Article
Marwolaethau adar y môr ger arfordir Cymru 1969 P. Hope Jones. View Article
Blodau gwyllt Eryri Evan Roberts. View Article
Evan Roberts Warren Martin, W. Jones. View Article
Gweiriau viviparus y mynydd Verna Jones. View Article
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Ffyngau R.O. Millar. View Article
Geifr gwyllt Eryri I.G. Crook. View Article
Malwod Jane Hatto. View Article
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Y ddafad a'i chynefin Iorwerth Jones. View Article
Effeithiau ecolegol ar berthynas y ddafad a'r ucheldir J. Dale, D.I. Rees a I. Ellis-Wiliams. View Article
Anifeiliaid ysglyfaethus D.C. Steel. View Article
Edrych ymlaen i'r saithdegau Tom Pritchard. View Article
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Welsh Contributions to Exploration in Patagonia. Book review. R. M. P. View Article
Graded examples for 'O' Level physics in S.I. units. Book review. G. E. O. View Article
Biology and Ethics. Book review. H. R. E. View Article
Nodiadau o'r Colegau View Article
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