Revision of the family Eustheniidae (order Perlaria) with descriptions of new genera and species Volume 46 1921 [Leather Bound]
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![Revision of the family Eustheniidae (order Perlaria) with descriptions of new genera and species Volume 46 1921 [Leather Bound]](https://m.media-amazon.com/images/I/41qaVm0pKML._SL75_.jpg "Revision of the family Eustheniidae (order Perlaria) with descriptions of new genera and species Volume 46 1921 [Leather Bound]")