This Spider-Woman #37 comic book features the first appearance of Siryn Theresa Cassidy. It has been professionally graded by CBCS with a score of 9.8 Near Mint/Mint and features white pages. The comic is a single issue from the Bronze Age (1970-83) and is part of the Spider-Woman series published by Marvel Comics. The issue number is 37 and it was released in 1981. The comic book is inscribed with neither signature nor certification number. The language is English and the intended audience is general.