Nature conservation

Ижил төстэй зүйлс

• The nature book A popular description by pen and camera of the delights and beauties of the open air.
  Хэвлэсэн: (1913)
• Natur schutz arbeit in sachsen
  Хэвлэсэн: (1986)
• Natural Connections Perspectives in Community-based Conservation
  -н: Western D.
  Хэвлэсэн: (1994)
• International Symposium and First World Congress on the Preservation and Conservation of Natural History Collections, Abstracts
  Хэвлэсэн: (1992)
• International Symposium and First World Congress on the Preservation and Conservation of Natural History Collections, Program
  Хэвлэсэн: (1992)