BERGSMA, E. Aerial photo-interpretation for soil erosion and conservation survey part I: Soil erosion features.
芝加哥风格引文BERGSMA, E. Aerial Photo-interpretation for Soil Erosion and Conservation Survey Part I: Soil Erosion Features.
MLA引文BERGSMA, E. Aerial Photo-interpretation for Soil Erosion and Conservation Survey Part I: Soil Erosion Features.
警告：这些引文格式不一定是100％准确.