Reference Entry

crop marks

David Hey

in The Oxford Dictionary of Local and Family History

Published in print January 1997 | ISBN: 9780198600800
Published online January 2003 | e-ISBN: 9780191727696
crop marks

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On intensively cultivated land, where ancient sites have been obliterated by the plough, crop marks seen from aeroplanes can give

Reference Entry.  32 words. 

Subjects: Local and Family History

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