BERGSMA, E. Aerial photo-interpretation for soil erosion and conservation survey part I: Soil erosion features.
Citación estilo ChicagoBERGSMA, E. Aerial Photo-interpretation for Soil Erosion and Conservation Survey Part I: Soil Erosion Features.
Cita MLABERGSMA, E. Aerial Photo-interpretation for Soil Erosion and Conservation Survey Part I: Soil Erosion Features.
Warning: These citations may not always be 100% accurate.