TY  - BOOK
AU  - Ling,George Herbert
AU  - Wentworth,George
AU  - Smith,David Eugene
TI  - Elements of projective geometry
U1  - 516.57 
PY  - 1922///
CY  - Boston
PB  - Ginn and company
KW  - Geometry, Projective
KW  - Harmonic forms
ER  -