Sheet metal as an area of industrial arts instruction in Pennsylvania public schools
By: [prepared by Ralph D. Widdowson].
Contributors: Pennsylvania. Dept. of Public Instruction.
Series: Bulletin [new ser.] ;; 331J; Bulletin (Pennsylvania. Dept. of Public Instructions).; no. 331J.
Publisher: Pennsylvania Dept. of Public Instruction
Published: 1953
Place of publication: Harrisburg
Language: eng
Number of pages: 43
Subjects: Sheet-metal work.
Notes: Instructional aids: books, free materials, films": p. 27-32.
"A supplement to Industrial arts in Pennsylvania, Bulletin 331, published in ... 1951."