North, Nelson L. Real estate principles and practices. [electronic resource] . — 5th ed.. — : Prentice-Hall,, 1960.. — 504 p. LCCN: 60006301 Nat. Bib. No.: GB60-12502 Subjects--Topical Terms: Real estate business. LC Class. No.: HD1375 / .N617 1960 Dewey Class. No.: 333.330973