Northridge, CA: Northridge Products, 1948. Very Good. Second Edition. Northridge, CA: Northridge Products; 1948, Second revised edition [8.75x11”]; Dark blue embossed stiff paper covers with blue and silver lettering on front, plastic spiral bound, text printed on four colors [peach, green, orange,yellow] of paper to designate chapters; 152 pp.; Some..... Item #13095