Layard, Richard.
Cost benefit analysis: Richard. Layard - 3 ed. - usa : penguin books 1977. - 495p.; 18 cm.
HD47.4 / .L39 1972
339. 5 lay
Cost benefit analysis: Richard. Layard - 3 ed. - usa : penguin books 1977. - 495p.; 18 cm.
HD47.4 / .L39 1972
339. 5 lay