Acknowledged authors
Heisig,
James W.
wrote Kanji Study Cards
comprising pages back in 1992.
Textbook and eTextbook are published under ISBN 0870408852 and 9780870408854.
Since then Kanji Study Cards textbook
was available to sell back to BooksRun online for the top buyback price
or rent at the marketplace.
A boxed set of 2,042 flash cards contains full information on kanji including Chinese and Japanese readings, English equivalents, and hints for vocabulary building.