0377-9424

0377-9424

S0377-94242016000100081

10.15517/rac.v40i1.25336

USA

United State

Colombia

00 06 2016

00 06 2016

40 1 81 88

2008 61

394-404

2004

85

2008

336

2001 73

251-62

2006 59

189-96

2007 60

350-8

1970 30

203-6

2006

2009 9

3586-603

2009

3-4

1996 60

659-68

2014 30

389

NATIONAL RESEARCH COUNCIL 1996 7th ed

242

2013

122

2007 29

217-22

2000 80

405-13

2005 58

256-66