Cowan, G.I.

Wetland bibliography for South Africa

1996 van der Walt, M. M. | Cowan, G.I. | Erasmus, A. | Marneweck, G. C. |

A directory of South African wetlands

1998 Cowan, G.I. | Riet, W. van |

Biota of South African wetlands in relation to the Ramsar convention

1999 Cowan, G.I. |

Wetlands of South Africa

1995 Cowan, G.I. |

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