M. E. Bentley, Stallings, R. Y., and Gittelsohn, J.,
“Guidelines for the use of structured observations in health behavior intervention studies”. Johns Hopkins University, School of Hygiene and Public Health, Baltimore, MD, USA, p. iii, 119 p.: fig., 1990.
C. B. Holmes,
The honest truth about lying with statistics. Springfield, IL, USA: Charles C. Thomas, 1990, p. ix, 82 p.: 6 fig.
M. E. Bentley and Herman, E.,
“Manuals for ethnographic data collection : experience and issues”. Johns Hopkins University, School of Hygiene and Public Health, Baltimore, MD, USA, p. ii, 29 p. + annexes (ca. 10 p.), 1990.