Successful surveys/
GRAY, G.
Successful surveys/ George Gray and Neil Guppy. - Canada: Harcourt Brace & Company, 1993. - xiv, 193 p.: ill.; 23 cm.
Includes index.
077473180X
Research Methodology.
DUCE HN29.G73
Successful surveys/ George Gray and Neil Guppy. - Canada: Harcourt Brace & Company, 1993. - xiv, 193 p.: ill.; 23 cm.
Includes index.
077473180X
Research Methodology.
DUCE HN29.G73