TY  - BOOK
AU  - Warren, Samuel Edward,
TI  - General problems of shades and shadows
AV  - QA501 W377
PY  - 1875///
CY  - New York
PB  - J. Wiley
KW  - Proyección (Geometría)
KW  - Geometría descriptiva
N1  - "forned both by parallel and by radial rays ; and shown both in common and in isometrical projection : together with the theory of shading"
ER  -