"cochran, william g. "
sampling techniques: / william.g. cochran - 3 ed. - india : wiley eastern 1990. - "xvi, 428p.; 22 cm."
0-85226-121-7
statistics
sampling techniques: / william.g. cochran - 3 ed. - india : wiley eastern 1990. - "xvi, 428p.; 22 cm."
0-85226-121-7
statistics