Randolph P. Hoelscher

the teaching of mechanical drawing

Randolph P. Hoelscher, 1929 .

Graphics for Engineers

Randolph P. Hoelscher, 1968 .

Graphics for Engineers: Visualization, Communication, and Design

Randolph P. Hoelscher, Jerry S. Dobrovolny, Clifford Harry Springer, 1984 .

Basic drawing for engineering technology

Randolph P. Hoelscher, Jerry S. Dobrovolny, Clifford Harry Springer, 1964 .

Engineering drawing and geometry

Randolph P. Hoelscher, Clifford Harry Springer, C. Springer, 1961 .