Issues for FY70-FY79-FY74-FY00 prepared by: George H. Waring.
Plný text je přístupný pouze z počítačů Ostravské univerzity
Issues for 1979-1989 cumulate from 1970; 1990- cumulate from 1974; no issues published between 2000 and <2011>. No survey was conducted for fiscal years 2001-2008; survey resumes with fiscal year 2009, and reports based on it and future surveys are forthcoming.
Description based on: FY70/FY79; title from title screen (viewed Sept. 11, 2012).