Stata user's guide : release 12

Stata user's guide : release 12 . - College Station : Stata Press, cop. 2011 . - X, 389 p. : il. 24 cm . - (Stata 12)
1-59718-095-5 Brochado978-1-59718-095-5

519.2:681.3.06
681.3.06:519.2