. . "Form books" . . . "Law--United States (General)--Regulation of industry, trade, and commerce. Occupational law--Transportation and communication--Postal service--Rates. Postage. Modes of collecting--Stamped envelopes" . "Stamped envelopes" . . . . "Law--United States (General)--Regulation of industry, trade, and commerce. Occupational law--Transportation and communication--Postal service--Rates. Postage. Modes of collecting--Stamped envelopes--Form books" . "KF2733.A65" . . . . "Form books" . . . "Stamped envelopes" . "Law--United States (General)--Regulation of industry, trade, and commerce. Occupational law--Transportation and communication--Postal service--Rates. Postage. Modes of collecting--Stamped envelopes" . "KF2733.A65" . .