International Symposium on Remote Sensing of Environment.International Symposium on Remote Sensing of Environment ( 7th : 1971 : Ann Arbor Mich.)．v.3.The Univ. of Mich.,1971.
International Symposium on Remote Sensing of Environment.International Symposium on Remote Sensing of Environment ( 7th : 1971 : Ann Arbor Mich.)．v.1.The Univ. of Mich.,1971.
International Symposium on Remote Sensing of Environment.International Symposium on Remote Sensing of Environment ( 7th : 1971 : Ann Arbor Mich.)．v.2.The Univ. of Mich.,1971.
