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By: Van Doesburg, P HType: ArticleIn: Entomologische berichtenVolume: 30Series:Issue: 8Date: 1970Page Range: 157--158Publication Info: AmsterdamSubjects:
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By: Van Doesburg, P HType: ArticleIn: Entomologische berichtenVolume: 31Series:Issue: 11Date: 1971Page Range: 207--214Publication Info: AmsterdamSubjects:
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By: Van Doesburg, P H - Siwi, S SType: ArticleIn: Entomologische berichtenVolume: 43Series:Issue: 10Date: 1983Page Range: 153--155Publication Info: AmsterdamSubjects: