United States. DEPARTMENT OF AGRICULTURE. ECONOMIC RESEARCH SERVICE. WORLDWIDE USE OF AIRPHOTOS IN AGRICULTURE.
Čikaški stil citiranja (17. izdanje)United States. DEPARTMENT OF AGRICULTURE. ECONOMIC RESEARCH SERVICE. WORLDWIDE USE OF AIRPHOTOS IN AGRICULTURE. U.S.G.P., 1967. (AGRICULTURE HANDBOOK NO. 344).
MLA način citiranja (8. izdanje)United States. DEPARTMENT OF AGRICULTURE. ECONOMIC RESEARCH SERVICE. WORLDWIDE USE OF AIRPHOTOS IN AGRICULTURE.
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