reface to the 2nd edition, what are things a traveler would not see in 1993 that he would have seen in 1963? And, what replacements are found in 1993?...

According to the author's

preface to the 2nd edition, what are things a traveler would not

see in 1993 that he would have seen in 1963? And, what replacements are found in 1993? from the book The dobe Ju/ 'hoansi from Richard B lee