(0002) Block out background with POSCA markers (pg.16) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)
(0003) Basic contour drawing (pg.26) (166) Art Before Breakfast: A Zillion Ways to be More Creative No Matter How Busy You Are by Danny Gregory (Digital)
(0010) Drawing background in a different color/style (pg.15) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)
(0012) Exercises 1.9-1.16 - Strokes (pg.20-27) (167) Pen and Ink Drawing Workbook (Volume 2) Pen and Ink Drawing by Alphonso A Dunn (Physical)
(0013) Looking Down Sketch (from drone pics?) (pg.27) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)
(0015) Paint first then ink (Ian Fennelly) (pg.123) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)
(0016) Brush pen people (only black) (pg.143) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)
(0017) Only 1 or 2 bright colors (pg.177) (015) The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe by Stephanie Bower (Physical)