Pickford, G. E. (1937). A monograph of the Acanthodriline earthworms of South Africa. Priv. print. for the author by the Bournemouth Guardian, Ltd. 1-97.
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Pickford, G. E.
1937
A monograph of the Acanthodriline earthworms of South Africa.
Priv. print. for the author by the Bournemouth Guardian, Ltd