- Brussels: n.p., 1929.
- later pamphlet binding, original self paper wrappers
- pp. 205-241
Price: $20.00 other currencies
Order Nr. 107301
Text in French. Extracts from La Service Sociale, (Brussels: November-December 1929), works on pure and applied botany. Guidelines for non-specialists. From the library of Gavin Bridson with his signature in ink on inside pamphlet binding.