By Barton Bill   in ZDM

ISSN:1863-9690|31|2|54-58

Springer Publishing Company ‎(1999)‎

Access to resources Favorite 16.516167

By Barwell Richard   Barton Bill   Setati Mamokgethi   in Educational Studies in Mathematics

ISSN:0013-1954|64|2|113-119

Springer Publishing Company ‎(2007)‎

Access to resources Favorite 9.9097

By Barton Bill   Whaley Ross   Burns Ann Forest   Schildwachter Greg   Meridith Denise P.   Stewart Frank M.   in Journal of Forestry

ISSN:0022-1201|91|1|25-29

Society of American Foresters‎(1993)‎

Access to resources Favorite 6.193574