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page <br />Topo Sheet Key <br />This EDR Topo Map Report is based upon the following USGS topographic map sheets. <br />- <br />1976 Source Sheets <br />1976 <br />Lathrop <br />7.5-minute, 24000 <br />Aerial Photo Revised 1976 <br />1968 Source Sheets <br />1968 <br />Lathrop <br />7.5-minute, 24000 <br />Aerial Photo Revised 1968 <br />1952 Source Sheets <br />1952 <br />Lathrop <br />7.5-minute, 24000 <br />Aerial Photo Revised 1949 <br />1915 Source Sheets <br />1915 <br />Lathrop <br />7.5-minute, 31680 <br />6499481 4 4