【作者(必填)】Boga,

【文题(必填)】orienteering the sport of navigating with map and compass

【年份(必填)】1997

【全文链接或数据库名称(选填)】http://books.google.com.hk/books?id=8uvNBcGj9SgC&pg=PA52&lpg=PA52&dq=memory#v=onepage&q=memory&f=false