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N.  Gourbault, ?Cavernicolous Triclades of the Pyrenees III Contribution to the Study of Atrioplanaria Atrioplanaria delamarei new species?, Annales de Speleologie, vol. 24, no. 2, pp. 377-385, 1969.

A. G.  van der Linden, ?Chromosome number and ploidy-level in a Dutch population of Crenobia alpina Dana (Planaria)?, Genetica, vol. 40, no. 1, pp. 61-4, 1969.

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J. H.  Postlethwait and Schneiderman, H. A., ?A clonal analysis of determination in Antennapedia a homoeotic mutant of Drosophila melanogaster?, vol. 64, 1969.

I. R.  Ball, Reynoldson, T. B., and Warwick, T., ?The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Platyhelminthes: Turbellaria) in Britain?, Journal of Zoology, vol. 157, pp. 99?123, 1969.

M.  Kawakatsu, ?Report on freshwater planaria from India?, Annotationes zoologicae Japonenses, vol. 42, pp. 210-215, 1969.

I. R.  Ball, ?An annotated checklist of the freshwater Tricladida of the Nearctic and Neotropical Regions?, Canadian Journal of Zoology, vol. 47, pp. 59-64, 1969.

R.  Kenk, ?Freshwater triclads (Turbellaria) of North America. I. The genus Planaria?, Proceedings of the Biological Society of Washington, vol. 82, pp. 539-558, 1969.

M.  Kawakatsu, ?An illustrated list of japanese freshwater planarians in color?, Bulletin of Fuji Women?s College, vol. 7, pp. 45-91, 1969.