Shu xu zhi nan : er shi juan - Chinese rare book collection, LOC

The book that appears in 'Si ku zong mu' was based on the version created ca. 1723-1735. Therefore, this book, printed between 1522 and 1566, is likely the oldest version extant. The versions found in 'Yin xuan cong shu' and 'Zhu cong bie lu' were based upon this version.
In case.
Also available in digital form on the Library of Congress Web site.
明嘉靖六年沈松刻本 四周雙欄 黑口 單魚尾 版匡高20.0寬14.3公分.
十行二十字 註文雙行字同. Ten lines, with twenty characters per line; notes in paired lines with the same number of characters.
原題:「浚水任廣德儉編次。」按四庫總目據清雍正間金匯刻本著錄，此嘉靖本，似為現存是書之最古者。惜陰軒叢書珠叢別錄本，皆從此本出。卷內有:「海昌許氏古均閣藏書」，「許氏古均閣印」，「許〓」等印記。沈松(序)嘉靖六年(1527)，呂柟(序)嘉靖六年(1527).