Ha'odom Al Hayarei'ach (Jerusalem 1970) — a discussion of the theological and legal issues involved when the moon was explored HaMechilta DeRashbi VeHaRambam (New York 1943) — a discussion of the relationship between the Rambam's Mishneh Torah and a recently published midrash. Divrei Menachem — responsa from many of the foremost scholars of the day, including the Rogatchover Gaon and the Klei Chemda. 4 volumes were published; in 1977, 19080, 1981 and 1983.