Pilsbry, Henry Augustus, 1862-1957.
Philadelphia, Printed by the George W. Carpenter Fund for the Encouragement of Original Scientific Research, 1939-1948.
1948
Pilsbry, Henry Augustus, 1862-1957.
Philadelphia, Printed by the George W. Carpenter Fund for the Encouragement of Original Scientific Research, 1939-1948.
1948
Pilsbry, Henry Augustus, 1862-1957.
Philadelphia, Printed by the George W. Carpenter Fund for the Encouragement of Original Scientific Research, 1939-1948.
1948