John R. Clark, Caroline Hatton Clark & Rolland R. Smith.
Workbook in arithmetic. Grade 6.
R581749. Workbook in arithmetic. Grade 6. By John R. Clark, Caroline Hatton Clark & Rolland R. Smith. © 10Jun47; AA54869. John R. Clark & Caroline Hatton Clark (A); 29Jul74; R581749.
John R. Clark & Caroline Hatton Clark|A