TY - SER TI - American heritage of invention & technology SN - 8756-729 U1 - 605 PY - 1985///- CY - New York : PB - American Heritage, KW - Technology KW - Periodicals N1 - Latest issue consulted: Vol. 5, no. 2 (Fall 1989); Publication suspended between summer 2007 and summer 2008 issues; vo lume numbering resumed with no gap ER -