!Kung, To Hold Our Ground: A Field Report
written by Claire Ritchie, fl. 1991 and John Marshall, 1932-2005; directed by John Marshall, 1932-2005 and Claire Ritchie, fl. 1991; produced by Documentary Educational Resources (DER), in !Kung (Watertown, MA: Documentary Educational Resources (DER), 1991), 33 mins
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