Haggett, Peter. Locational Analysis in Human Geography / Peter Haggett, Andrew D. Cliff, Allan Frey. - 2nd ed. - London : Edward Arnold, 1977. - xiv, 605 p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: 0713158999 : Subjects--Topical Terms: Human geography.Economic geography. Dewey Class. No.: 301.3 / HAL 1977