By Pickwell, Gayle Benjamin.
New York Dover Publications 1972 .
xviii, 234 p. , Reprint of the 1947 ed. 22 cm..
0486216861

By Duncan, Carl Dudley.
New York | London McGraw-Hill Book Company, inc. 1939 .
ix, 409 p. incl. col. front., illus. , "Some of the material of this book was originally issued in a publication by the San Jose State College at San Jose, California. In the present work this material has been extensively revised, many new sections and one totally new chapter have been introduced."--Pref. 24 cm..